hard; though the former be but from an outward | Certain it is, that bay-salt, which is but a kind cause; for that the stone, or wainscot, turneth of water congealed, will sometimes smell like and beateth back the air against itself; and the latter is an inward swelling of the body of the wood itself.

violets.

Experiment solitary touching sweet smells. 833. To sweet smells heat is requisite to conExperiment solitary touching the nature of appetite coct the matter; and some moisture to spread the

in the stomach.

831. Appetite is moved chiefly by things that are cold and dry; the cause is, for that cold is a kind of indigence of nature, and calleth upon supply; and so is dryness: and therefore all sour things, as vinegar, juice of lemons, oil of vitriol, &c., provoke appetite. And the disease which they call appetitus caninus, consisteth in the matter of an acid and glassy phlegm in the mouth of the stomach. Appetite is also moved by sour things; for that sour things induce a contraction in the nerves placed in the mouth of the stomach, which is a great cause of appetite. As for the cause why onions, and salt, and pepper in baked meats, move appetite, it is by vellication of those nerves; for motion whetteth. As for wormwood, olives, capers, and others of that kind, which participate of bitterness, they move appetite by abstersion. So as there be four principal causes of appetite; the refrigeration of the stomach joined with some dryness, contraction, vellication, and abstersion; besides hunger; which is an emptiness; and yet over-fasting doth, many times, cause the appetite to cease; for that want of meat maketh the stomach draw humours, and such humours as are light and choleric, which quench appetite most.

breath of them. For heat, we see that woods and spices are more odorate in the hot countries than in the cold: for moisture, we see that things too much dried lose their sweetness: and flowers growing, smell better in a morning or evening than at noon. Some sweet smells are destroyed by approach to the fire; as violets, wallflowers, gillyflowers, pinks; and generally all flowers that have cool and delicate spirits. Some continue both on the fire, and from the fire; as rosewater, &c. Some do scarce come forth, or at least not so pleasantly, as by means of the fire; as juniper, sweet gums, &c., and all smells that are enclosed in a fast body: but generally those smells are the most grateful, where the degree of heat is small; or where the strength of the smell is allayed; for these things do rather woo the sense, than satiate it. And therefore the smell of violets and roses exceedeth in sweetness that of spices and gums; and the strongest sort of smells are best in a weft afar off.

Experiment solitary touching the corporeal substance of smells.

834. It is certain, that no smell issueth but with emission of some corporeal substance; not as it is in light, and colours, and in sounds. For we see plainly, that smell doth spread nothing that distance that the other do. It is true, that some woods of oranges, and heaths of rosemary, will smell a great way into the sea, perhaps twenty miles; but what is that, since a peal of ordnance will do as much, which moveth in a small compass? Whereas those woods and heaths are of vast spaces; besides, we see that smells do adhere to hard bodies; as in perfuming of gloves, &c., which showeth them corporeal ; and do last a great while, which sounds and light do not.

odours.

832. It hath been observed by the ancients, that where a rainbow seemeth to hang over or to touch, there breatheth forth a sweet smell. The cause is, for that this happeneth but in certain matters, which have in themselves some sweetness; which the gentle dew of the rainbow doth draw forth: and the like do soft showers; for they also make the ground sweet: but none are so delicate as the dew of the rainbow where it falleth. It may be also that the water itself hath some sweetness; for the rainbow consisteth Experiment solitary touching fetid and fragrant of a glomeration of small drops, which cannot possibly fall but from the air that is very low; and therefore may hold the very sweetness of the herbs and flowers, as a distilled water; for rain, and other dew that fall from high, cannot preserve the smell, being dissipated in the drawing up neither do we know, whether some water itself may not have some degree of sweetness. It is true, that we find it sensibly in no pool, river, nor fountain; but good earth, newly turned up, hath a freshness and good scent; which water, if it be not too equal, for equal objects never move the sense, may also have.

835. The excrements of most creatures smell ill; chiefly to the same creature that voideth them: for we see, besides that of man, that pigeons and horses thrive best, if their houses and stables be kept sweet, and so of cage birds: and the cat burieth that which she voideth and it holdeth chiefly in those beasts which feed upon flesh. Dogs almost only of beasts delight in fetid odours, which showeth there is somewhat in their sense of smell differing from the smells of other beasts. But the cause why excrements smell ill is manifest; for that the body itself rejecteth

to the more general axioms by scale. And of these kinds of processes of natures and charac ters of matter, we will now set down some instances.

tion.

836. All putrefactions come chiefly from the inward spirits of the body; and partly also from the ambient body, be it air, liquor, or whatsoever else. And this last by two means: either by ingress of the substance of the ambient body into the body putrefied; or by excitation and solicitation of the body putrefied, and the parts thereof, by the body ambient. As for the received opinion, that putrefaction is caused, either by cold, or peregrine and preternatural heat, it is but nuga. tion: for cold, in things inanimate, is the greatest enemy that is to putrefaction; though it extinguisheth vivification, which ever consisteth in spirits attenuate, which the cold doth congeal and coagulate. And as for the peregrine heat, it is thus far true, that if the proportion of the adventive heat be greatly predominant to the natural heat and spirits of the body, it tendeth to dissolution, or notable alteration. But this is wrought by emission, or suppression, or suffoca tion, of the native spirits; and also by the disordination and discomposture of the tangible parts, and other passages of nature, and not by a conflict of heats.

them; much more the spirits: and we see that those excrements that are of the first digestion, smell the worst; as the excrements from the belly; those that are from the second digestion less ill as urine; and those that are from the third, yet less: for sweat is not so bad as the Experiment solitary touching the causes of putrefacother two; especially of some persons, that are full of heat. Likewise most putrefactions are of an odious smell: for they smell either fetid or mouldy. The cause may be, for that putrefaction doth bring forth such a consistence, as is most contrary to the consistence of the body whilst it is sound for it is a mere dissolution of that form. Besides, there is another reason, which is profound and it is, that the objects that please any of the senses have all some equality, and, as it were, order in their composition; but where those are wanting, the object is ever ingrate. So mixture of many disagreeing colours is ever unpleasant to the eye: mixture of discordant sounds is unpleasant to the ear: mixture, or hotchpotch of many tastes, is unpleasant to the taste; harshness and ruggedness of bodies is unpleasant to the touch; now it is certain, that all putrefaction, being a dissolution of the first form, is a mere confusion and unformed mixture of the part. Nevertheless it is strange, and seemeth to cross the former observation, that some putrefactions and excrements do yield excellent odours, as civet and musk; and, as some think, ambergrease: for divers take it, though improbably, to come from the sperm of fish: and the moss we spake of from apple-trees is little better than an excretion. The reason may be, for that there passeth in the excrements, and remaineth in the putrefactions, some good spirits; especially where they proceed from creatures that are very hot. But it may be also joined with a further cause, which is more subtile; and it is, that the senses love not to be over-pleased, but to have a commixture of somewhat that is in itself ingrate. Certainly, we see how discords in music, falling upon concords, make the sweetest strains and we see again, what strange tastes delight the taste: as red herrings, caviary, parmesan, &c. And it may be the same holdeth in smells: for those kind of smells that we have mentioned, are all strong, and do pull and vellicate the sense. And we find also, that places where men urine, commonly have some smells of violets: and urine, if one hath eaten nutmeg, hath so too.

The slothful, general, and indefinite contemplations, and notions, of the elements and their conjugations; of the influences of heaven; of heat, cold, moisture, drought, qualities active, passive, and the like, have swallowed up the true passages, and processes, and affects, and consistences of matter and natural bodies. Therefore they are to be set aside, being but notional and ill limited; and definite axioms are to be drawn out of measured instances: and so assent to be made VOL. II.-15

Experiment solitary touching bodies unperfectly mixed.

837. In versions, or main alterations of bodies, there is a medium between the body, as it is at first, and the body resulting; which medium is corpus imperfecte mistum, and is transitory, and not durable; as mists, smokes, vapours, chylu in the stomach, living creatures in the first vivifi cation; and the middle action, which produceth such imperfect bodies, is fitly called, by some o the ancients, inquination, or inconcoction, which is a kind of putrefaction: for the parts are in cor fusion, till they settle one way or other.

Experiment solitary touching concoction and crudity.

838. The word concoction, or digestion, is chiefly taken into use from living creatures and their organs; and from thence extended to liquors and fruits, &c. Therefore they speak of meat concocted; urine and excrements concocted; and the four digestions, in the stomach, in the liver, in the arteries and nerves, and in the several parts of the body, are likewise call concoctions: and they are all made to be the works of heat; all which notions are but ignorant catches of a few things, which are most obvious to men's observations. The constantest notion of concoction is, that it should signify the degrees of alteration,

K 2

Experiment solitary touching bodies liquefiable, and not liquefiable.

840. Liquefiable, and not liquefiable, proceed from these causes; liquefaction is ever caused by the detention of the spirits, which play within the

of one body into another, from crudity to perfect | quefiable, not liquefiable; fragile, tough; flexibleconcoction; which is the ultimity of that action inflexible; tractile, or to be drawn forth in length, or process; and while the body to be converted intractile; porous, solid; equal and smooth, un, and altered is too strong for the efficient that equal; venous and fibrous, and with grains, entire; should convert or alter it, whereby it resisteth and divers others; all which to refer to heat, and and holdeth fast in some degree the first form or cold, and moisture, and drought, is a compendious consistence, it is all that while crude and incon- and inutile speculation. But of these see princicoct; and the process is to be called crudity and pally our "Abecedarium naturæ;" and otherwise inconcoction. It is true, that concoction is in "sparsim" in this our "Sylva Sylvarum:" great part the work of heat, but not the work of nevertheless, in some good part, we shall handle heat alone: for all things that further the conver- divers of them now presently. sion or alteration, as rest, mixture of a body already concocted, &c., are also means to concoction. And there are of concoction two periods; the one assimilation, or absolute conversion and subaction; the other maturation; whereof the former is most conspicuous in the bodies of living creatures in which there is an absolute conver-body and open it. Therefore such bodies as are sion and assimilation of the nourishment into the body and likewise in the bodies of plants: and again in metals, where there is a full transmutation. The other, which is maturation, is seen in liquors and fruits; wherein there is not desired, nor pretended, an utter conversion, but only an alteration to that form which is most sought for man's use; as in clarifying of drinks, ripening of fruits, &c. But note, that there be two kinds of absolute conversions; the one is, when a body is converted into another body, which was before; as when nourishment is turned into flesh; that is it which we call assimilation. The other is, when the conversion is into a body merely new, and which was not before; as if silver should be turned to gold, or iron to copper: and this conversion is better called, for distinction sake, trans-more flexible. Moreover there are some bodies mutation.

Experiment solitary touching alterations, which may be called majors.

839. There are also divers other great alterations of matter and bodies, besides those that tend to concoction and maturation; for whatsoever doth so alter a body, as it returneth not again to that it was, may be called "alteratio major;" as when meat is boiled, or roasted, or fried, etc., or when bread and meat are baked; or when cheese is made of curds, or butter of cream, or coals of wood, or bricks of earth; and a number of others. But to apply notions philosophical to plebeian terms; or to say, where the notions cannot fitly be reconciled, that there wanteth a term or nomenclature for it, as the ancients used, they be but shifts of ignorance; for knowledge will be ever a wandering and indigested thing, if it be but a commixture of a few notions that are at hand and occur, and not excited from sufficient number of instances, and those well collated.

The consistence of bodies are very diverse dense, rare; tangible, pneumatical; volatile, fixed; determinate, not determinate; hard, soft; cleaving, not cleaving; congelable, not congelable, li

more turgid of spirit; or that have their spirits more straitly imprisoned; or, again, that hold them better pleased and content, are liquefiable: for these three dispositions of bodies do arrest the emission of the spirits. An example of the first two properties is in metals; and of the last in grease, pitch, sulphur, butter, wax, &c. The disposition not to liquefy proceedeth from the easy emission of the spirits, whereby the grosser parts contract; and therefore bodies jejune of spirits, or which part with their spirits more willingly, are not liquefiable; as wood, clay, free-stone, &c. But yet even many of those bodies that will not melt, or will hardly melt, will notwithstanding soften: as iron in the forge; and a stick bathed in hot ashes, which thereby becometh

which do liquefy or dissolve by fire; as metals, wax, &c.: and other bodies which dissolve in water; as salt, sugar, &c. The cause of the former proceedeth from the dilatation of the spirits by heat: the cause of the latter proceedeth from the opening of the tangible parts, which desire to receive the liquor. Again, there are some bodies that dissolve with both as gum, etc. And those be such bodies, as on the one side have good store of spirit; and on the other side, have the tangible parts indigent of moisture; for the former helpeth to the dilating of the spirits by fire; and the latter stimulateth the parts to receive the liquor.

Experiment solitary touching bodies fragile and tough.

841. Of bodies, some are fragile and some are tough, and not fragile; and in the breaking, some fragile bodies break but where the force is; some shatter and fly in many pieces. Of fragility, the cause is an impotency to be extended; and therefore stone is more fragile than metal; and so fictile earth is more fragile than crude earth; and dry wood than green. And the cause of this unaptness to extension, is the small quan

Experiment solitary touching concretion and disso- and tow, and cotton, and silk, especially raw silk,