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do the like, he followeth by the sight of another. | nourishment into the parts more forcibly.
So the laughing of another maketh to laugh.
Experiment solitary touching infectious diseases.

297. There be some known diseases that are

infectious; and others that are not. Those that are infectious are, first, such as are chiefly in the spirits, and not so much in the humours, and therefore pass easily from body to body; such are pestilences, lippitudes, and such like. Secondly, such as taint the breath, which we see passeth manifestly from man to man, and not invisibly, as the effects of the spirits do; such are consumptions of the lungs, &c. Thirdly,

such as come forth to the skin, and therefore taint

the air of the body adjacent, especially if they consist in an unctuous substance not apt to dissipate, such as scabs and leprosy. Fourthly, such as are merely in the humours, and not in the spirits, breath, or exhalations; and therefore they never infect but by touch only; and such a touch also as cometh within the "epidermis;" as the venom of the French pox, and the biting of a mad dog.

Experiment solitary touching the incorporation of

powders and liquors.

298. Most powders grow more close and coherent by mixture of water, than by mixture of oil, though oil be the thicker body: as meal, &c. The reason is, the congruity of bodies; which if it be more, maketh a perfecter imbibition and incorporation; which in most powders is more between them and water, than between them and oil: but painters' colours ground, and ashes, do better incorporate with oil.

Experiment solitary touching exercise of the body. 299. Much motion and exercise is good for some bodies; and sitting and less motion for others. If the body be hot and void of superfluous moistures, too much motion hurteth: and it is an error in physicians to call too much upon exercise. Likewise men ought to beware, that they use not exercise and a spare diet both: but if much exercise, then a plentiful diet; and if sparing diet, then little exercise. The benefits that come of exercise are, first, that it sendeth

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condly, that it helpeth to excern by sweat, and so maketh the parts assimilate the more perfectly. Thirdly, that it maketh the substance of the body more solid and compact, and so less apt to be consumed and depredated by the spirits. The evils that come of exercise are, first, that it maketh the spirits more hot and predatory, Secondly, that it doth absorb likewise, and attenuate too much the moisture of the body. Thirdly, that it maketh too great concussion, especially if it be violent, of the inward parts, which delight more in rest. But generally exercise, if it be much, is no friend to prolongation of life, which is one cause why women live longer than men, because they stir less.

Experiment solitary touching meats that induce satiety.

300. Some food we may use long, and much, without glutting, as bread, flesh that is not fat or rank, &c. Some other, though pleasant, glutteth sooner, as sweet-meats, fat-meats, &c. The cause is, for that appetite consisteth in the emptiness of the mouth of the stomach, or possessing it with somewhat that is astringent, and therefore cold and dry. But things that are sweet and fat are more filling, and do swim and hang more about the mouth of the stomach, and go not down so speedily: and again turn soon to choler, which is hot, and ever abateth the appetite. We see also that another cause of satiety is an over-custom, and of appetite is novelty, and therefore meats, if the same be continually taken, induce loathing. To give the reason of the distaste of satiety, and of the pleasure in novelty, and to distinguish not only in meats and drinks, but also in motions, loves, company, delights, studies, what they be that custom maketh more grateful, and what more tedious, were a large field. But for meats, the cause is attraction, which is quicker, and more excited towards that which is new than towards that whereof there remaineth a relish by former use. And, generally, it is a rule, that whatsoever is somewhat ingrate at first is made grateful by custom; but whatsoever is too pleasing at first, groweth quickly to satiate.

CENTURY IV.

Experiments in consort touching the clarification

306. On the other side it were good to try, of liquors, and the accelerating thereof. what the adding to the liquor more lees than his ACCELERATION of time, in works of nature, may own will work; for though the lees do make the well be esteemed "inter magnalia naturæ." And | liquor turbid, yet they refine the spirits. Take even in divine miracles, accelerating of the time therefore a vessel of new beer, and take another is next to the creating of the matter. We will vessel of new beer, and rack the one vessel from the now therefore proceed to the inquiry of it: and lees, and pour the lees of the racked vessel into for acceleration of germination, we will refer it the unracked vessel, and see the effect: this inover unto the place where we shall handle the stance is referred to the refining of the spirits. subject of plants generally, and will now begin with other accelerations.

301. Liquors are, many of them, at the first, thick and troubled; as muste, wort, juices of fruits, or herbs expressed, &c. and by time they settle and clarify. But to make them clear before the time is a great work, for it is a spur to nature, and putteth her out of her pace: and, besides, it is of good use for making drinks and sauces potable and serviceable speedily. But to know the means of accelerating clarification, we must first know the causes of clarification. The first cause is, by the separation of the grosser parts of the liquor from the finer. The second, by the equal distribution of the spirits of the liquor with the tangible parts: for that ever representeth bodies clear and untroubled. The third, by the refining the spirit itself, which thereby giveth to the liquor more splendour and more lustre.

307. Take new beer, and put in some quantity of stale beer into it, and see whether it will not accelerate the clarification, by opening the body of the beer, and cutting the grosser parts, whereby they may fall down into lees. And this instance again is referred to separation.

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308. The longer malt or herbs, or the like, are infused in liquor, the more thick and troubled the liquor is; but the longer they be decocted in the liquor, the clearer it is. The reason is plain, because in infusion, the longer it is, the greater is the part of the gross body that goeth into liquor: but in decoction, though more gon forth, yet it either purgeth at the top, or settleth at the bottom. And therefore the most exact way to clarify is, first, to infuse, and then to take off the liquor and decoct it; as they do in beer, which hath malt first infused in the liquor, and is afterIwards boiled with the hop. This also is referred to separation.

302. First, for separation, it is wrought by weight, as in the ordinary residence or settlement 309. Take hot embers, and put them about a of liquors; by heat, by motion, by precipitation, bottle filled with new beer, almost to the very or sublimation, that is, a calling of the several neck; let the bottle be well stopped, lest it fly parts either up or down, which is a kind of at-out; and continue it, renewing the embers every traction; by adhesion, as when a body more day, by the space of ten days, and then compare viscous is mingled and agitated with the liquor, which viscous body, afterwards severed, draweth with it the grosser parts of the liquor; and lastly, by percolation or passage.

303. Secondly, for the even distribution of the spirits, it is wrought by gentle heat; and by agitation or motion, for of time we speak not, because it is that we would anticipate and represent; and it is wrought also by mixture of some other body which hath a virtue to open the liquor, and to make the spirits the better pass through.

304. Thirdly, for the refining of the spirit, it is wrought likewise by heat, by motion, and by mixture of some body which hath virtue to attenuate. So therefore, having shown the causes for the accelerating of clarification in general, and the inducing of it, take these instances and trials.

305. It is in common practice to draw wine or beer from the lees, which we call racking, whereby it will clarify much the sooner; for the lees, though they keep the drink in heart, and make it lasting, yet withal they cast up some spissitude: and this instance is to be referred to separation.

it with another bottle of the same beer set by. Take also lime both quenched and unquenched, and set the bottles in them "ut supra." This instance is referred both to the even distribution, and also to the refining of the spirits by heat.

310. Take bottles, and swing them, or carry them in a wheel-barrow upon rough ground twice in a day, but then you may not fill the bottles full, but leave some air; for if the liquor come close to the stopple, it cannot play nor flower: and when you have shaken them well either way, pour the drink into another bottle stopped close after the usual manner, for if it stay with much air in it, the drink will pall; neither will it settle so perfectly in all the parts. Let it stand some twentyfour hours, then take it, and put it again into a bottle with air, "ut supra :" and thence into a bottle stopped, "ut supra :" and so repeat the same operation for seven days. Note, that in the emptying of one bottle into another, you must do it swiftly lest the drink pall. It were good also to try it in a bottle with a little air below the neck, without emptying. This instance is referred to the even distribution and refining of the spirits by motion

311. As for percolation inward and outward, which belongeth to separation, trial would be made of clarifying by adhesion, with milk put into new beer, and stirred with it: for it may be that the grosser part of the beer will cleave to the milk: the doubt is, whether the milk will sever well again; which is soon tried. And it is usual in clarifying hippocras to put in milk; which after severeth and carrieth with it the grosser parts of the hippocras, as hath been said elsewhere. Also for the better clarification by percolation, when they tun new beer, they use to let it pass through a strainer, and it is like the finer the strainer is the clearer it will be.

Experiments in consort touching maturation, and the accelerating thereof. And first, touching the maturation and quickening of drinks. And next, touching the maturation of fruits.

The accelerating of maturation we will now inquire of. And of maturation itself. It is of three natures. The maturation of fruits, the maturation of drinks, and the maturation of imposthumes and ulcers. This last we refer to another place, where we shall handle experiments medicinal. There be also other maturations, as of metals, &c. whereof we will speak as occasion serveth. But we will begin with that of drinks, because it hath such affinity with the clarification of liquors.

312. For the maturation of drinks, it is wrought by the congregation of the spirits together, whereby they digest more perfectly the grosser parts: and it is effected partly by the same means that clarification is, whereof we spake before; but then note, that an extreme clarification doth spread the spirits so smooth, as they become dull, and the drink dead, which ought to have a little flowering. And therefore all your clear amber drink is flat. 313. We see the degrees of maturation of drinks in muste, in wine, as it is drunk, and in vinegar. Whereof muste hath not the spirits well congregated; wine hath them well united, so as they make the parts somewhat more oily; vinegar hath them congregated, but more jejune, and in a smaller quantity, the greatest and finest spirit and part being exhaled for we see vinegar is made by setting the vessel of wine against the hot sun; and therefore vinegar will not burn; for that much of the finer parts is exhaled.

314. The refreshing and quickening of drink palled or dead, is by enforcing the motion of the spirit so we see that open weather relaxeth the spirit, and maketh it more lively in motion. We see also bottling of beer or ale, while it is new and full of spirit, so that it spirteth when the stopple is taken forth, maketh the drink more quick and windy. A pan of coals in the cellar doth likewise good, and maketh the drink work again. New drink put to drink that is dead provoketh it to work again: nay, which is more, as some affirm, a brewing of new beer set by old beer

maketh it work again. It were good also to enforce the spirits by some mixtures that may excite and quicken them; as by putting into the bottles, nitre, chalk, lime, &c. We see cream is matured and made to rise more speedily by putting in cold water; which, as it seemeth, getteth down the whey.

315. It is tried, that the burying of bottles of drink well stopped, either in dry earth a good depth; or in the bottom of a well within water; and best of all, the hanging of them in a deep well somewhat above the water for some fortnight's space, is an excellent means of making drink fresh and quick; for the cold doth not cause any exhaling of the spirits at all, as heat doth, though it rarifieth the rest that remain; but cold maketh the spirits vigorous, and irritateth them, whereby they incorporate the parts of the liquor perfectly.

316. As for the maturation of fruits, it is wrought by the calling forth of the spirits of the body outward, and so spreading them more smoothly: and likewise by digesting in some degree the grosser parts; and this is effected by heat, motion, attraction, and by a rudiment of putrefaction; for the inception of putrefaction hath in it a maturation.

317. There were taken apples, and laid in straw, in hay, in flour, in chalk, in lime; covered over with onions, covered over with crabs, closed up in wax, shut in a box, &c. There was also an apple hanged up in smoke, of all which the expe riment sorted in this manner.

318. After a month's space, the apple enclosed in wax was as green and fresh as at the first putting in, and the kernels continued white. The cause is, for that all exclusion of open air, which is ever predatory, maintaineth the body in its first freshness and moisture; but the inconvenience is, that it tasteth a little of the wax: which I suppose, in a pomegranate, or some such thick-coated fruit, it would not do.

319. The apple hanged in the smoke turned like an old mellow apple, wrinkled, dry, soft, sweet, yellow within. The cause is, for that such a degree of heat, which doth neither melt nor scorch, (for we see that in a greater heat, a roast apple softeneth and melteth; and pigs' feet, made of quarters of wardens, scorch and have a skin of cole,) doth mellow, and not adure: the smoke also maketh the apple, as it were, sprinkled with soot, which helpeth to mature. We see that in drying of pears and prunes in the oven, and removing of them often as they begin to sweat, there is a like operation; but that is with a far more intense degree of heat.

320. The apples covered in the lime and ashes were well matured, as appeared both in their yellowness and sweetness. The cause is, for that that degree of heat which is in lime and ashes, being a smothering heat, is of all the rest most proper, for it doth neither liquefy nor arefy, and that is true maturation. Note, that the taste of those

apples was good, and therefore it is the experi- she would perform her own work; and that, if

ment fittest for use.

321. The apples covered with crabs and onions were likewise well matured. The cause is, not any heat; but for that the crabs and the onions draw forth the spirits of the apple, and spread them equally throughout the body, which taketh away hardness. So we see one apple ripeneth against another. And therefore in making of cider they turn the apples first upon a heap. So one cluster of grapes that toucheth another whilst it groweth, ripeneth faster; "botrus contra botrum citius maturescit."

the crudities, impurities, and leprosities of metals were cured, they would become gold; and that a little quantity of the medicine, in the work of projection, will turn a sea of the baser metal into gold by multiplying: all these are but dreams; and so are many other grounds of alchymy. And to help the matter, the alchymists call in likewise many vanities out of astrology, natural magic, superstitious interpretations of Scriptures, auricular traditions, feigned testimonies of ancient authors, and the like. It is true, on the other side, they have brought to light not a few profitable experiments, and thereby made the world some amends. But we, when we shall come to handle the version and transmutation of bodies, and the experiments concerning metals and minerals, will lay open the true ways and passages of nature, which may lead to this great effect. And we commend the wit of the Chinese, who despair of making of gold, but are mad upon the making of silver: for certain it is, that it is more difficult to make gold, which is the most ponderous and materiate amongst metals, of other metals less ponderous and less materiate, than "via versa," to make silver of lead or quicksilver, both which are more ponderous than silver: so that they need rather a further degree of fixation than any condensation. In the mean time, by

322. The apples in hay and the straw ripened apparently, though not so much as the other; but the apple in the straw more. The cause is, for that the hay and straw have a very low degree of heat, but yet close and smothering, and which drieth not. 323. The apple in the close box was ripened also: the cause is, for that all air kept close hath a degree of warmth; as we see in wool, fur, plush, &c. Note, that all of these were compared with another apple of the same kind that lay of itself; and in comparison of that were more sweet and more yellow, and so appeared to be more ripe. 324. Take an apple or pear, or other like fruit, and roll it upon a table hard: we see in common experience, that the rolling doth soften and sweeten the fruit presently; which is nothing but the smooth distribution of the spirits into the parts; occasion of handling the axioms touching matufor the unequal distribution of the spirits maketh | the harshness: but this hard rolling is between concoction and a simple maturation; therefore, if you should roll them but gently, perhaps twice a day, and continue it some seven days, it is like they would mature more finely, and like unto the natural maturation.

325. Take an apple, and cut out a piece of the top, and cover it, to see whether that solution of continuity will not hasten a maturation: we see that where a wasp, or a fly, or a worm hath bitten, in a grape, or any fruit, it will sweeten hastily.

326. Take an apple, &c., and prick it with a pin full of holes, not deep, and smear it a little with sack, or cinnamon water, or spirit of wine, every day for ten days, to see if the virtual heat of the wine or strong waters will not mature it.

In these trials also, as was used in the first, set another of the same fruits by to compare them, and try them by their yellowness and by their

sweetness.

Experiment solitary touching the making of gold. The world hath been much abused by the opinion of making of gold: the work itself I judge to be possible; but the means hitherto propounded to effect it are, in the practice, full of error and imposture, and in the theory, full of unsound imaginations. For to say, that nature hath an intention to make all metals gold; and that, if she were delivered from impediments, VOL. II.-7

ration, we will direct a trial touching the maturing of metals, and thereby turning some of them into gold: for we conceive indeed, that a perfect good concoction, or digestion, or maturation of some metals, will produce gold. And hereby, we call to mind, that we knew a Dutchman, that had wrought himself into the belief of a great person, by undertaking that he could make gold: whose discourse was, that gold might be made; but that the alchymists over-fired the work: for, he said, the making of gold did require a very temperate heat, as being in nature a subterrany work, where little heat cometh; but yet more to the making of gold than of any other metal; and therefore that he would do it with a great lamp that should carry a temperate and equal heat; and that it was the work of many months. The device of the lamp was folly; but the over-firing now used, and the equal heat to be required, and the making it a work of some good time, are no ill discourses.

We resort therefore to our axioms of maturation, in effect touched before. The first is, that there be used a temperate heat; for they are ever temperate heats that digest and mature: wherein we mean temperate according to the nature of the subject; for that may be temperate to fruits and liquors, which will not work at all upon metals. The second is, that the spirits of the metal be quickened, and the tangible parts opened: for without those two operations, the spirit of the metal wrought upon will not be able to digest the parts.

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The third is, that the spirits do spread themselves even, and move not subsultorily, for that will make the parts close and pliant. And this requireth a heat that doth not rise and fall, but continue as equal as may be. The fourth is, that no part of the spirit be omitted but detained: for if there be emission of spirit, the body of the metal will be hard and churlish. And this will be performed, partly by the temper of the fire, and partly by the closeness of the vessel. The fifth is, that there be choice made of the likeliest and best prepared metal for the version, for that will facilitate the work. The sixth is, that you give time enough for the work; not to prolong hopes, as the alchymists do, but indeed to give nature a convenient space to work in. These principles are most certain and true; we will now derive a direction of trial out of them, which may, perhaps, by further meditation, be improved.

327. Let there be a small furnace made of a temperate heat; let the heat be such as may keep the metal perpetually molten, and no more; for that above all importeth to the work. For the material, take silver, which is the metal that in nature symbolizeth most with gold; put in also with the silver, a tenth part of quicksilver, and a twelfth part of nitre, by weight; both these to quicken and open the body of the metal; and so let the work be continued by the space of six months at the least. I wish also, that there be at some times an injection of some oiled substance, such as they use in the recovering of gold, which by vexing with separations hath been made churlish; and this is to lay the parts more close and smooth, which is the main work. For gold, as we see, is the closest, and therefore the heaviest of metals; and is likewise the most flexible and tensible. Note, that to think to make gold of quicksilver, because it is the heaviest, is a thing not to be hoped; for quicksilver will not endure the manage of the fire. Next to silver, I think copper were fittest to be the material.

Experiment solitary touching the nature of gold. 328. Gold hath these natures; greatness of weight, closeness of parts, fixation, pliantness or softness, immunity from rust, colour or tincture of yellow. Therefore the sure way, though most about, to make gold, is to know the causes of the several natures before rehearsed, and the axioms concerning the same. For if a man can make a metal that hath all these properties, let men dispute whether it be gold or no.

Experiments in consort touching the inducing and

accelerating of putrefaction.

The inducing and accelerating of putrefaction is a subject of very universal inquiry: for corruption is a reciprocal to generation: and they two are as nature's two terms or boundaries; and the guides to life and death. Putrefaction is the work

of the spirits of bodies, which ever are unquiet to get forth and congregate with the air, and to enjoy the sunbeams. The getting forth, or spreading of the spirits, which is a degree of getting forth, hath five differing operations. If the spirits be detained within the body, and move more-violently, there followeth colliquation, as in metals, &c. If more mildly, there followeth digestion or maturation, as in drinks and fruits. If the spirits be not merely detained, but protrude a little, and that motion be confused and inordinate, there followeth putrefaction; which ever dissolveth the consistence of the body into much inequality, as in flesh, rotten fruits, shining wood, &c., and also in the rust of metals. But if that motion be in a certain order, there followeth vivification and figuration; as both in living creatures bred of putrefaction, and in living creatures perfect. But if the spirits issue out of the body, there followeth desiccation, induration, consumption, &c., as in brick, evaporation of bodies liquid, &c.

329. The means to induce and accelerate putrefaction, are, first, by adding some crude or watery moisture; as in wetting of any flesh, fruit, wood, with water, &c., for contrariwise unctuous and oily substances preserve.

330. The second is by invitation or excitation: as when a rotten apple lieth close to another apple that is sound; or when dung, which is a substance already putrefied, is added to other bodies. And this is also notably seen in churchyards, where they bury much, where the earth will consume the corpse in far shorter time than other earth will.

331. The third is by closeness and stopping, which detaineth the spirits in prison more than they would; and thereby irritateth them to seek issue; as in corn and clothes, which wax musty; and therefore open air, which they call "aër perflabilis," doth preserve: and this doth appear more evidently in agues, which come, most of them, of obstructions, and penning the humours which thereupon putrefy.

332. The fourth is by solution of continuity; as we see an apple will rot sooner if it be cut or pierced; and so will wood, &c. And so the flesh of creatures alive, where they have received any wound.

333. The fifth is either by the exhaling or by the driving back of the principal spirits which preserve the consistence of the body; so that when their government is dissolved, every part returneth to his nature or homogeny. And this appeareth in urine and blood when they cool, and thereby break: it appeareth also in the gangrene, or mortification of flesh, either by opiates or by intense colds. I conceive also the same effect is in pestilences: for that the malignity of the infecting vapour danceth the principal spirits, and maketh them fly and leave their regiment; and then the humours, flesh, and secondary spirits, do dissolve and break, as in an anarchy.

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