510 parts in the whole, which produce 57 parts of dry alcohol; that is, containing no more water than is necessary to its formation, and consequently as strong as it can be. Let us dwell for a moment upon the proportions just pointed out, and especially upon their result, which exceeds any thing that has ever been obtained. Supposing the weight of each of those parts to be one pound, we shall have
The produce will be 57lbs. of dry alcohol.
TR: Poor quality made it difficult to verify the above numbers and so noted with an asterisk
A vessel containing one ounce of water, filled up with this alcohol, weighs only 16dwts. and 16grs. From this report, it appears that the specific weight of the alcohol is, to the weight of the water, as 20 to 24; that is, that water weighs 1/5 more than alcohol. If the 57lbs. thus obtained were only water, it would only represent 7-1/8* gallons; but being alcohol, it weighs 1/6* less, and consequently gives 7-1/8 gallons more, the sixth of this quantity, (to wit:) 1-1/6* gallons, which, added to 7-1/8*, make 8-7/24 gallons.
But 1 gallon of dry alcohol, extended in 2 gallons of water, gives 3 gallons of liquor at 19°, which is called Holland, or first proof; a produce surpassing all what has been hitherto known to the distillers. I will prove it by an example: 1 gallon of molasses yields only 1 gallon of rum, at 19°, to the rum distiller; still, molasses is a true sirup, composed of 8lbs. of sugar, or sweet matter, more fermentable than sugar. 12½ gallons of molasses, representing 100lbs. of dry sweet matter yield consequently 12½ galls. of rum, Holland proof, which is only half the produce obtained by Lavoisier; an immense difference capable of exciting the emulation of all distillers, as it proves the imperfection of the art.
What are the causes of such a dissimilarity of product? We must seek for them.
1st. In the difference of the strength of the vinous liquor. Lavoisier employed only 4 parts of water to 1 part of dry sugar. The rum distiller usually puts 10 gallons of molasses to 90 gallons of water, or the residue of the preceding distillations.
10 galls. molasses contain
80 lbs. of sweet matter.
90 gallons of water weigh 720lbs.; therefore the proportion is, one part of sweet matter to 9 parts of water—whilst that indicated by Lavoisier is only 4 parts of water to 1 part of sugar.[a]
It is obvious how much richer this last must be, and that the fermentation thus produced has an energy far superior to the other. Thence results a rapid production of spirit, operated in a short time; whilst that of the rum distiller languishes more or less, and a slow fermentation wastes part of the spirit which it produces, even as it is forming.
2dly. Bodies evaporate in proportion to the extent of their surface. One hogshead of 100 gallons, should contain, according to Lavoisier's composition, the elements of 50 gallons of spirit, at 19°; whilst that of the rum distiller contains only 12. Now, as every fermentable liquor requires open vessels, the hogshead of the rum distiller loses as much spirit as that of Lavoisier: hence it is plain how far the above proportion operates to the disadvantage of the fermer.
3dly. Another source of loss arises in the distilling vessels themselves. Nothing is more imperfect than the stills of a whiskey distillery. Lavoisier's were so perfect, that he made the analysis and the synthesis in the most delicate operations. [b] The vessels of the whiskey distillers, far from being hermetically closed, allow the spirit to evaporate through every joint. And this is not all: corroded by the acetous acid, they are full of small holes, particularly in the cap, where all the vapors collect themselves, as in a reservoir. It is easy to conceive with what rapidity they escape, which occasions a considerable waste of liquor. In proof of the truth of this observation, we may refer to the smell of whiskey, so strongly perceivable on the roads leading to a distillery, and preceeding from no other cause than that liquor wasting out of bad vessels, to the great loss of the distiller.
4thly. A fourth cause of loss arises from the worm of the still. However careful in keeping the surrounding water cool, there is always one portion of vapor not condensed. This is made more sensible in the winter, when the cold of the atmosphere makes every vapor visible; upon examination, it will be seen that the running stream of liquor is surrounded with it. In my description of my apparatus, I give the means of obviating that evil.
To these several causes, may we not add another? May not the production of spirit be in a ratio to the richness of the fermenting liquor? It is certain, that in every spirituous fermentation there is a portion of the sweet matter which remains undecomposed and in its original state. Lavoisier found that it was 4.940; that is, nearly 5 parts in 100. It may possibly be the same in a weaker liquor; which would increase the loss, in the inverse ratio of the density of the liquor. Such are the causes to which I attribute the great superiority of Lavoisier's products; and from those observations I thought I could establish the fabrication of whiskey upon new principles.
A COMPARISON OF THE PROCESSES OF THE BREWER WITH THOSE OF THE WHISKEY DISTILLER.
From the experiments of one of the most learned chymists of Europe, it has been demonstrated, that the proportions the most advantageous to the formation of a good vinous liquor, are, one part of dry sweet substance to four parts of water; that is, that the sugar must form one fifth of the whole. We have, moreover, seen that 100lbs. of dry sweet matter gave 25 gallons of spirit 19°, which comes to 4lbs. of sugar per gallon.
We shall make use of that scale in comparing the processes of the brewer with those of the whiskey distiller.
Supposing the bushel of grain to weigh 50 pounds, and that it gives 2 gallons of whiskey at 19°, each of which gallons is the product of 4lbs. of sugar; then the strong beer which contains in 40 gallons the sweet matter of 200lbs. of grain, contains the elements of 8 gallons of spirit, or 32lbs. of dry sweet substance; and as the 40 gallons of this beer weigh 320lbs. the 32lbs. of sugar form only one-tenth of it, which is one half of Lavoisier's proportions.
Those of the distiller of whiskey are 100lbs. of grain to 100 gallons of water, or thereabouts: 100lbs. of grain contain only 16lbs. of dry sweet matter: therefore, as the 100 gallons of vinous liquor weigh 800lbs. the 16lbs. of sugar form only its fiftieth part.
Thence is seen how inferior the proportions of the whiskey distiller are to those of the brewer, and how far they are from good theory. But the brewer aims only at producing a sort of wine, and succeeds; while, the distiller wants to make spirit, and only obtains it in the manner the most expensive, and opposed to his own interest.
DEFECTS IN THE USUAL METHOD OF MAKING WHISKEY.
1st. The most hurtful of all for the interests of the distillers, is undoubtedly the weakness of the vinous liquor. We have seen that the proportion of spirit is in a ratio to the richness of the fermenting liquor; that Lavoisier, by putting one-fifth of the mass of dry sugar, obtained twice as much spirit as the rum distiller, who puts in the same quantity, but drowns it in water. From those principles, which are not contested, the distiller, whose vinous liquor contains only one-fiftieth part of sweet matter, obtains the less spirit, and loses as much of it as he gets.
2dly. Another defect is joined to this: bodies are dissolved by reason of their affinity with the dissolving principle; the mucilaginous substance is as soluble in water as the saccharine substance. A mass of 100 gallons of water having only 16lbs. of sugar to dissolve, exerts it's dissolving powers upon the mucilaginous part which abounds in grains, and dissolves a great quantity of it. There results from that mixture, a fermentation partaking of the spirit and the acid, and if the temperature of the atmosphere is moderate, the acid invades the spirit, which is one of its principles: nothing remains but vinegar, and the hopes of the distiller are deceived.
Some distillers have been induced, by the smallness of their products, to put in their stills, not only the fluid of the liquor, but the flour itself. Hence result two important defects. 1st. The solid matter precipitates itself to the bottom of the still, where it burns, and gives a very bad taste to the whiskey. In order to remedy this inconvenience, it has been imagined to stir the flour incessantly, by means of a chain dragged at the bottom of the still, and put in motion by an axis passing through the cap, and turned by a workman until the ebullition takes place. This axis, however well fitted to the aperture, leaves an empty space, and gives an issue to the spirituous vapors, which escaping with rapidity, thereby occasion a considerable loss of spirit.
3dly. The presence of the grain in the still, converted into meal, is not otherwise indifferent. It contains a kind of essential oil, more or less disagreeable, according to its nature; which distils with the spirit. That of Indian corn, in particular, is more noxious than that of any other grain; and it is the presence of meal in the stills, which causes the liquors obtained from grains to be so much inferior to that of fruits.
4thly. There is a fourth defect, at which humanity shudders, and which the laws ought to repress. Vinous liquors are more or less accompanied with acetone acid, or vinegar; but those proceeding from grain contain still more of this acid. The stills are generally made of naked copper; the acid works upon that metal, and forms with it the acetate of copper, or verdigrise, part of which passes with the whiskey. There is no distiller, who, with a little attention, has not observed it. I have always discovered it in my numerous rectifications, and at the end of the operation, when nothing more comes from the still but what is called the sweet oil of wine. An incontestable proof of this truth is, that as the stills of the distillers are of a green color in their interior part; that they are corroded with the acid, and pierced with numberless little holes, which render them unfit for use in a very short time. It is easy to conceive how hurtful must be the presence of verdigrise to those who make use of whiskey as a constant drink: even those who use it soberly, swallow a slow poison, destructive of their stomach; while to those who abuse it, it produces a rapid death, which would still be the consequence of abuse, if the liquor was pure, but is doubly accelerated by the poison contained in the whiskey. It is easy to remedy so terrible an evil. The acetous acid has no action upon tin. By tinning the stills, the purity of the liquor will be augmented, and the distilling vessels, already so expensive, will be longer preserved. This operation must be renewed every year. The worms must likewise be tinned, if they are copper; but they are better of tin, or of the purest pewter.
Such are the defects of the present method of distilling whiskey. Having exposed them, I must present the means of bringing to perfection the fabrication of a liquor of such general use.
DESCRIPTION OF THE PROCESS THE MOST ADVANTAGEOUS TO MAKE WHISKEY.
TR: The next 2 paragraphs were cut short, noted with [*]
As it is demonstrated that the spirit is the more abundant in proportion to the richness of the vinous liquor,* it is therefore necessary to enrich that of the distillery* which is so deficient in that respect. An exposition of* my processes will point out the means I employ to attain* that end. A large whiskey distillery should be* able to make 100 gallons per day, or three barrels* making altogether that quantity.
One gallon of spirit being the produce of 4 pounds* of dry saccharine matter, we must therefore have 400 pounds of this substance for the 100 gallons we wish to obtain.
If 1 bushel of grain gives 2 gallons of whiskey, there must be 50 to obtain a daily result of 100 gallons. I take Indian corn as the basis of the fabrication, as that of all the grains which yields the most. For, from my method, whatever grain is employed, the spirit is equally pure.
I divide the still house into three different rooms, to wit:
One for Infusion;
One for Fermentation;
One for Distillation.
THE ROOM OF INFUSION.
It is here that the liquor destined to make whiskey, should be prepared, and made rich enough to procure a good fermentation. To this effect, there must be a mill with a vertical stone, moved by a horse, or any other means of motion. Those mills are too well known for me to describe them more amply. The corn must be coarsely ground, so as scarcely to be broke into three or four pieces: consequently the stone must not be too heavy, for, at all events, the grain had better be too coarse than too fine. That mill should be placed in the infusion room, so as not to keep it dirty, nor to be too much in the way. It must grind, or rather break, 50 bushels per day.
There must be a square kettle, 4 feet broad, 5 feet long, 1 foot deep. The kettle must be made in sheets of copper, one line thick, at least: the bottom, although flat, should have a slight swell inside, so as to avoid the expansion of the metal outside, from the action of the fire. This kettle must be placed upon a brick furnace, so that the longest parts should bear forwards, and the other against the chimney, from which it must be separated by a brick wall eight or nine inches. The sides, around which there must be a space to walk freely, should be supported by a wall 1½ feet deep; the fore part upon such a wall, in the middle of which is an iron door, fifteen inches square, in an iron frame, through which the fuel is introduced.
The kettle is mounted upon the furnace, so as to bear upon the four walls about 4 inches, and rests upon a bed of clay, which must leave no passage to the action of the fire; it is lined externally with bricks, and must have a pipe on one of its sides, to draw off the liquor.
Under the kettle, 15 inches from the bottom, is a flue for the heat, running through all its length. It is 2½ feet wide at bottom, extending like a fan at the top, about 6 inches on each side, so that the flame may circulate in all the breadth of the kettle.
On the fore part of this flue, facing the door, is a hearth, occupying all its breadth, and 2 feet long. The rest of the flue is paved with bricks, and rises insensibly 4 inches towards the chimney, in which it opens by two holes, 1½ inches wide, 8 or 9 inches high.
Immediately under the hearth, is a mash hole 4 feet deep, occupying all its capacity, and projecting 2 feet forward. This opening is necessary to keep up a free circulation of air, and to take up the ashes. It should be covered with strong boards, not to hinder the service of the kettle. The hearth is made with an iron grate, more or less close, according to the nature of the fuel; if for wood, the bars must be about two inches apart; if for coals, half an inch is sufficient. The furnace must be built with care. The parts most exposed to the action of the fire must be built with soft bricks and potters' clay: soap stone would be preferable, if easy to procure. The brick separating the kettle and chimney, must be supported with flat bars of iron, as well as the part over the door.
USE OF THE KETTLE.
The kettle is destined to make the infusion of the grain, and boil it so as to convert it into wort. By that operation I make the liquor richer, which I intend for fermentation, and bring it to divers degrees of strength.
I put into the kettle 100 gallons of water, and 4 bushels of corn, broken, as I said before, at the mill. I light a small fire, which I increase gradually, until the water begins to boil; during that time, the grain is stirred with a paddle. As soon as the ebullition is established, the grain is taken up with a large skimmer, and put to drain into a large basket hanging over the kettle; and when the grain has been totally taken up, the fire is increased so as to bring the water to boil again, until reduced to two-fifths, which degree of concentration is not rigorous, and the distiller may augment it as his experience shall direct. When thus concentrated, the liquor is drawn off through the pipe, and received into a tub or vat containing 130 or 140 galls.
100 gallons more of water are put into the kettle, with 4 bushels of corn; the fire conducted slowly, as before, until the degree of ebullition; the corn is taken off, and the liquor concentrated in the same proportions; then drawn off as above, in the same tub.
The same operation is repeated for the third time; the three united liquors are slightly stirred, and, still warm, transported into one of the hogsheads of fermentation, which it nearly fills up.
As there must be four of these hogsheads filled up daily, the work at the kettle must be kept going on, without interruption, until that quantity is obtained, which may be done in about twelve hours. The grain which has been drained is carried to dry, either in the open air, or in a granary, and spread thin. When dry, it is excellent food for cattle, and highly preferable to the acid and fermented mash, usually used by distillers to feed cattle and hogs: they eat the corn dried in the above manner as if it had lost nothing of its primitive qualities and flavor.
THE ROOM FOR FERMENTATION.
The room destined to the fermentation must be close, lighted by two or three windows, and large enough to contain a number of hogsheads sufficient for the distillery. It may be determined by the number of days necessary for the fermentation; 30 or 40 hogsheads may suffice, each of 120 or 130 gallons.
In the middle of the room must be a stove, large enough to keep up a heat of 75° to 80°, even in winter. A thermometer placed at one end of the room, serves to regulate the heat.
As soon as the liquor is in the hogshead, the yeast, or fermenting principle, is put into it, stirred for some moments, and then left to itself. A liquor as rich as the above described ferments with force, and runs with rapidity through all the periods of fermentation. It is fit to distil as soon as that tumultuous state has subsided and the liquor is calm.
The essential character of the spirituous fermentation, is to exhale the carbonic acid gaz in great quantity. This gaz is mortal to mankind, and to all the living creation. Thirty hogsheads of fermenting liquor producing a great deal of this gaz, the room should be purified of it by opening two opposite windows several times a day. This is the more essential, as the pure air, or oxigen, contributes to the formation of the spirit, of which it is one of the constituting principles. A short time, however, suffices to renew the air of the room.
It is useless to remark, that the hogsheads must be open at one end, and rest upon pieces of wood elevating them some inches from the ground. They must remain uncovered during the fermentation; and afterwards be covered with a flying lid, when the liquor is calm.
OF THE ROOM FOR DISTILLATION.
We have hitherto considered the liquor as containing only principles upon which the air has no action, and from which it can only extract some watery vapors; and, in fact, all those principles contained in the liquor are fixed. The action of the fire may concentrate, but not volatilize them.
The liquor is now changed by the fermentation; it contains no longer the same principles, but has acquired those which it had not, which are volatile, and evaporate easily. They must therefore be managed carefully, in order not to lose the fruits of an already tedious labor. The spirit already created in the fermented liquor, must be collected by the distillation; but in transporting it to the still, the action of the external air must be carefully avoided, as it would cause the evaporation of some of the spirit. A pump to empty the hogsheads, and covered pipes to conduct the liquor into the still, is what has been found to answer that purpose. A good distilling apparatus is undoubtedly the most important part of a distillery. It must unite solidity, perfection in its joints, economy of fuel, rapidity of distillation, to the faculty of concentrating the spirit. Such are the ends I have proposed to myself in the following apparatus.
The usual shape of stills is defective; they are too deep, and do not present enough of surface for their contents. They require a violent fire to bring them to ebullition; the liquor at bottom burns before it is warm at the top.
My still is made upon different principles, and composed of two pieces, viz. the kettle, and its lid. The kettle, forming a long square, is like the kettle of infusion, already described, and only differs from it in being one foot deeper. The lid is in shape like an ancient bed tester; that is to say, its four corners rise into a sharp angle, and come to support a circle 16 inches diameter, bearing a vertical collar of about two inches. This collar comes to the middle of the kettle, and is elevated about 4 feet from the bottom. The lid is fastened to the kettle. The collar receives a pewter cap, to which is joined a pipe of the same metal, the diameter of which decreases progressively to a little less than 3 inches: this pipe, the direction of which is almost horizontal, is 5 feet long.
My still, thus constructed, is established upon a furnace like that of the infusion room. I observe that the side walls are only raised to the half of the height of the kettle. A vertical pipe is placed on the side opposite to the pewter one, and serves to fill up the still: it is almost at the height of the fastening of the lid, but a little above. On the same side, on a level with the bottom, is a pipe of discharge, passing across the furnace: this pipe must project enough to help to receive or to direct the fluid residue of the distillation; its diameter must be such as to operate a prompt discharge of the still.
OF THE URNS.
These are copper vessels, thus called from their resembling those funeral vases of the ancients. Mine have a bottom of about 18 inches diameter; they are two feet high, have a bulge of 6 inches near the top, and then draw in to form an overture of about 8 inches.
On one side, towards the top, there is a copper pipe 2 inches diameter, projecting externally 2 or 3 inches, and bent in an elbow: it enters the internal part of the urn, and descends towards the bottom, without touching it; there it is only a slight curve, and remains open.
The external part of that pipe is fitted to receive the pewter pipe of the still; they are made so as to enter into one another, and must fit exactly. The round opening at the top of the urn receives a cap with a pewter pipe, made like that of the still. It is likewise five feet long, and its size in proportion to the opening: this goes and joins itself to the second urn, as the still does to the first. The pipe of this second goes to a third, and the pipe of this last to the worm. The three urns bear each a small pipe of discharge towards the bottom.
This apparatus must be made with the greatest care. Neither the joints, the different pipes of communication, nor the nailings, must leave the smallest passage to the vapors. The workman must pay the greatest attention to his work, and the distiller must lute exactly all the parts of the apparatus that are susceptible of it: he must be the more careful as to luting it, as this operation is only performed once a week, when the apparatus is cleaned. At the moment of the distillation, the master or his foreman must carefully observe whether there is any waste of vapors, and remedy it instantly. The still and urns ought to be well tinned.
EFFECTS OF THIS APPARATUS.
Although the still might contain 400 gallons, there must be only 200 gallons put into it: the rest remaining empty, the vapors develops themselves, and rise. In that state, the vinous liquor is about one foot deep, on a surface of 20 feet square: hence two advantages—the first, that being so shallow, it requires but little fuel to boil; the second, that the extent of surface gives rise to a rapid evaporation, which accelerates the work. This acceleration is such, that six distillations might be obtained in one day. The spirit contained in the vinous liquor rises in vapors to the lid of the still, there find the cap and its pipe, through which they escape into the first urn, by the side pipe above described, which conducts them to the bottom, where they are condensed immediately.
But the vapors, continuing to come into the urn, heat it progressively: the spirituous liquor that it contains rises anew into vapors, escapes through the cap and pipe, and arrives into the second urn, where it is condensed as in the first. Here again, the same cause produces the same effect: the affluence of the heat drawn with the vapors, carries them successively into the third urn, and from thence into the worm, which condenses them by the effects of the cold water in which it is immersed.
The urns, receiving no other heat than that which the vapors coming out of the still can transmit to them, raise the spirit; the water, at least the greatest part of it, remains at the bottom: hence, what runs from the worm is alcohol; that is, spirit at 35°. It is easily understood how the vapors coming out of the still are rectified in the urns, and that three successive rectifications bring the spirit to a high degree of concentration: it gets lower only when the vinous liquor draws towards the end of the distillation. As soon as it yields no more spirit, the fire is stopped, and the still is emptied in order to fill it up again, to begin a new distillation.
Each time that the vinous liquor is renewed in the still, the water contained in the urns must be emptied, through the pipes of discharge at the bottom.
Metals are conductors of the caloric. The heat accumulated in the still, rises to the cap, from whence it runs into the urns: with this difference—that the pewter, of which the cap and pipes are made, transmits less caloric than copper, because it is less dense: and that bodies are only heated in reason of their density.
However, a great deal of heat is still communicated to the worm, and heats the water in which it is immersed. I diminish this inconvenience by putting a wooden pipe between the worm and the pipe of the third urn. Wood being a bad conductor of caloric, produces a solution of continuity, or interruption between the metals. The wood of this pipe must be soft and porous, and not apt to work by the action of the fire: however, to avoid its splitting, I wrap it up in two or three doubles of good paper, well pasted, and dried slowly. This pipe is one foot long, and hollowed in its length, so as to receive the pewter pipe of the third urn at one end, and to enter the worm at the other; thereby the worm is not as hot, since it only receives the heat of the vapors which it condenses.
Notwithstanding all these precautions, it heats the water in which it is immersed after a length of time; and whatever care may be taken to renew it, all the vapors are not condensed, and this occasions a loss of spirit. I obviate this accident, by adding a second worm to the first: they communicate by means of a wooden pipe like the above. The effect of this second worm, rather smaller than the first, is such, that the water in which it is plunged remains cold, while that of the first must be renewed very often. By these means, no portion of vapors escape condensation. The liquor running from the worm is received into a small barrel, care being taken that it may not lose by the contact of the air producing evaporation.
They are of two kinds; the very putrescent bodies, and those supplied by the oxigen. Animal substances are of the first kind: acids, neutral salts, rancid oils, and metallic oxids, are of the second.
Were I obliged to make use of a ferment of the first class, I would choose the glutinous part of wheat flour. This vegeto-animal substance is formed in the following manner:—A certain quantity of flour is made into a solid dough, with a little water. It is then taken into the hands, and water slowly poured over it, while it is kneaded again. The water runs white, because it carries off the starchy part of the flour; it runs clear after it is washed sufficiently. There remains in the hands of the operator a dough, compact, solid, elastic, and reduced to nearly the half of the flour employed. This dough, a little diluted with water, and kept in the temperature indicated for the room of fermentation, passes to the putrid state, and contracts the smell of spoiled meat. Four pounds of this dough per hogshead, seem to me to be sufficient to establish a good fermentation. A small quantity of good vinegar would answer the same purpose, and is a ferment of the second class.
But are those means indispensable with my process? I do not think so.
1st. The richness of my vinous liquor, and the degree of heat to which I keep it, tend strongly to make it ferment. In fact, the infusion of the grain, by taking from it its saccharine part, takes likewise part of its mucilaginous substance, which is the principle of the spirituous fermentation, which it establishes whenever it meets with the other substance.
2dly. The hogsheads themselves are soon impregnated with a fermenting principle, and communicate it to the liquor that is put into them.
3dly. The rum distiller employs advantageously the residue of his preceding distillation, to give a fermentation to his new molasses: this residue has within itself enough of acidity for that purpose. Might not the residue of the distillation of my vinous liquor have the same acidity? It contains only the mucilaginous substance already acidulated. Some gallons of that residue to every hogshead, would, I think, be a very good ferment.
Lastly. Here is another means which will certainly succeed: it is to leave at the bottom of each hogshead three or four inches of the vinous liquor, when transported into the still for distilling. This rising, which will rapidly turn sour, will form a ferment sufficient to establish a good fermentation.
The intelligent manager of a distillery must conduct the means I indicate, towards the end which he proposes to himself, and must carefully avoid to employ as ferments, those disgusting substances which cannot fail to bring a discredit on the liquor in which they are known to be employed.
OF THE AREOMETER, OR PROOF BOTTLE.
This instrument is indispensable to the distiller: it ascertains the value of his spirits, since it shows the result of their different degrees of concentration. I will give the theory of this useful instrument, as it may be acceptable to those who do not know it.
Bodies sink in fluids, in a compound ratio to the volume and the density of those fluids, which they displace. It is from that law of nature, that a ship sinks 20 feet in fresh water, while it sinks only about 18 feet in sea water, which has more density on account of the salt dissolved therein.
The reverse of this effect takes place in fluids lighter than water, as bodies floating in them sink the more, as the liquor has less density. Upon those principles are made two kinds of areometers—one for fluids denser than water; the other for those that are lighter: the first are called salt proof; the second spirit proof. Distilled water is the basis of those two scales: it is at the top for the salt proof, and at the bottom for the spirit proof; because the first is ascending, and the other descending; but by a useless singularity, the distilled water has been graduated at 10° for the spirit proof bottle, and at 0 for the salt proof. We shall only dwell upon the first, because it is the only one interesting to the distiller.
Water being graduated at 10° in the areometer, it results from thence that the spirit going to 20°, is in reality only 10° lighter than water; and the alcohol at 35°, is only 25° above distilled water.
The areometer can only be just, when the atmosphere is temperate; that is, at 55° Fahrenheit, or 10° Reaumur. The variations in cold or heat influence liquors; they acquire density in the cold, and lose it in the heat: hence follows that the areometer does not sink enough in the winter, and sinks too much in the summer.
Naturalists have observed that variation, and regulated it. They have ascertained that 1° of heat above temperate, according to the scale of Reaumur, sinks the areometer 1/8 of a degree more; and that 1° less of heat, had the contrary effect: thus the heat being at 18° of Reaumur, the spirit marking 21° by the areometer, is really only at 20°. The cold being at 8° below temperate, the spirit marking only 19° by the areometer, is in reality at 20°. 2¼ of Fahrenheit corresponding to 1° of Reaumur, occasion in like manner a variation of 1/8 of a degree: thus, the heat being at 78½°, the spirit thus marking 21°, is only at 20; and the cold being at 87°, the spirit marking only 19° by the areometer, is in reality at 20°.
It is easily conceived, that extreme cold or extreme heat occasion important variations. For that reason, there are in Europe inspectors, whose duty it is to weigh spirits, particularly brandy: for that purpose they make use of the areometer and the thermometer. An areometer, to be good, must be proved with distilled water, at the temperature of 55°. Areometers, being made of glass, are brittle, and must be used with great care. This inconvenience might be remedied, by making them of silver; I have seen several of this metal. A good silversmith could easily make them; I invite those artists to attend to that branch of business; it might become valuable, as the distillers will be more enlightened.
ADVANTAGES OF MY METHOD.
The first of all, is derived from the composition of a vinous liquor, richer, and more proper to raise a vigorous fermentation, than that which is obtained by the usual method. Now, as it is proved that the quantity of spirit is in proportion to the richness of the fermenting liquor, mine therefore yields a great deal more spirit than any other.
2dly. We have seen that a heat of 75° or 80° must be kept up in the fermenting room: this being summer heat, proves that such a rich vinous liquor runs no risk of passing to the acid state with as much rapidity as that of the common distillers; and, consequently, that he who will follow my method can work all the year round without fear of losing the fruits of his labor, as it often happens—an advantage precious for him who makes it his sole business. The only change he has to make, is to suppress the heat of the stove, when the temperature of the atmosphere is sufficient to keep up a good fermentation in the liquor.
As to my distilling apparatus, this is not a new idea. I present it to the public under the sanction of experience. I had it executed in Philadelphia eight years ago, after having obtained a patent. It was made for a rum distillery, where they still continue to use it. It presents the greatest advantages.
The first is, that with a single fire, and a single workman, I distil and rectify the spirit three times, and bring it to the degree of alcohol; that is, to the greatest purity, and almost to the highest degree of concentration.
2dly. It lowers the cost of transportation, by two-thirds; because one gallon at 35° represents three gallons at the usual degree. The merchant, being arrived at the place of his destination, has only to add 2 gallons of water to 1 gallon of this alcohol, in order to have 3 gallons of whiskey; which is of a considerable advantage, either for land or sea carriage.
3dly. As the price of spirits is, in trade, in proportion to their degree of concentration, those made with my apparatus being at a very high degree, need no more rectifying, either for the retailer, the apothecary, or the painter; and the considerable expenses of that operation turn entirely to the profit of the distiller, as they are totally suppressed. Distillers may hereafter sell spirits of all degrees of concentration.
Such are the advantages of my processes. I offer them the more willingly to the public, as they are founded upon the most approved principles of natural philosophy: by reflecting upon them, distillers will be easily convinced of it.
However perfect the description of a new thing may be, our ideas of it are always defective, until we have seen it put into practical use. Few men have the means of establishing a distillery on a new plan, and even the most enlightened may make notable errors. Few, besides, are bold enough to undertake, at their own risks, the trial of a new fabrication: they are afraid of losing, and of being blamed for having too lightly yielded to the persuasion of new projectors. Hence it follows that a useful discovery falls into oblivion, instead of doing any good.
But no discovery of general utility ought to experience that fate in a republic. Government itself ought to promote the first undertaking, or a certain number of citizens ought to join in order to give it a start. It is the more easy in this case, as my apparatus requires very little expense.
If a distillery according to my directions, was established in some of the principal towns of the state, my method would then make rapid progress, and thus prove the truth of the principle which I have advanced; and the distillers, after having meditated upon my method in this book, would come and satisfy themselves of its goodness, by seeing it put into practice, and yielding the most perfect results, with all the advantages for trade that may be expected: hence would naturally ensue the rapid increase of distillation, and consequently that of agriculture and commerce.
THE ART OF