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Fluid, deserves to be tried, observed and considered. Whether they adhere to, clog and balance fome acid Corpuscles, which divide the Bodies in the Fluid too small, and free other sharp Bodies, so as to render the Fluid acid; or, whether they affist in dividing the Bodies in it to such a Degree of Smallness, as may prevent their Precipitation. They seem to What they be very small and penetrating, but in leem to do. Time they sheath themselves in fomething in the Fluid, and they lose their Effects upon our Palates, and their Effects are at least, not so sudden upon our Stomachs. Almost all Sorts of Bitters, taken naked into the Stomach, heighten and thin the Steam, and perhaps irritate the Glands in the Stomach, and make them fecrete. At what Time the Gall-bladder and Pancreas issue their Juices into the Duodenum, whether when the Steam is weakest there, and to the Juices are the least resisted ; ‘or, when the Steam is strongeft in the Duodenum and upper Guts, whereby their Position may be altered, or their Juices pressed out. This might, if afcertained, lead to discover their Uses, whether they be to heighten or flacken the Ferment. If the Juices in the Gallbladder and Pancreas be discharged only
into the Guts, 'tis very likely their chief Use is to prevent the Excrements, which sometimes undergo a long Fermentation there, from turning acid. And 'tis like
fome Position of the Guts, which the See p. 85. Condition of the Contents puts them into, and the whole when they want this or that Juice, gives Chapter. it an Opportunity of venting into them.
CH A P. XXXVI. Observations upon, and Comparisons be
tween the Effects of volatile Salts, and Sea Salts or fixed Salt.
ALL vegetable Matter contains active, 11 and volatile Salts and Spirits, fome acid, fome pungent, some Theathed or blunted, but all entangled with Corpuf-. cles of the Plant which contains them, lo as to affect our Palate with various Sensations, as hot, bitter, four, sweet, &c. and our Noses with various Smells. - All fresh Water contains some mineral, and some vegetable Salts, and all. Creatures livě upon vegetable Matter or Water, or upon the Flesh of one another; and the Juices of Plants, Vegetables and common Water, yield little Sea or fixed Salt. No Crea
ture but Man, especially of those at Land, or in the fresh Rivers, which we live mostly upon, except Pigeons and Bees, use Sea Salt in their Food. Nor does any Observa Creature but Man prepare Meat by Fire, tions upon
'human and though Fire bear off some of the Det," and volatile Salts, and the most volatile Part the Manof the Juices in the Meat, yet it agitates, narind nie
s in the meat, yet it agitates, paring his and divides, and frees, more of the active Meat. and volatile Salts, remaining in the Meat, from the Corpuscles of the Meat, and the Corpuscles of the Meat from one another; makes the Salts more sharp and active, and the Meat more easy to be diffolved, and does much the same. Thing, as the Sun does, in ripening Fruits, &c. only the Sun does it more leisurely, and preserves the fine Juices. Man extracts, and Upon his prepares, and divides his Drink by Fire, Drink. Distillation, Fermentation, &c. eats and drinks more volatile Salts and Spirits, and more freed from animal or vegetable Matter, and more sharpened by such Extractions and Preparations, than any other Creature. Man eats most of his Meat, His manand drinks some of his Drink hot ; keeps ne
Susing his his Body more defended from the Air by Victuals, Cloathing, Houses, Bed, Fire, &c. and of his
keeping consequently hotter than any other Crea- himself as túre. Citizens, more than Country People, to
where the Air is more replenish'd with volatile · Salts, Corpuscles of Fire, &C. raised by the great Number of Fires, respired from the People, &c. and the Air thereby lefs able to discharge such from
the Lungs, &c. Country People more Brutes, and than the wild Indians, &c. The Stotheir Living.
machs of Brutes, which live upon cold raw Plants, nay, some of them, without drinking any Fluid, can digest them. The Stomachs of Brutes, which live upon dry Vegetables, and simple Water, can digest them. The Stomachs of Brutes which live upon raw Animals, and drink a small
Proportion, or no Fluids at all, can digest Why them, Bones and all. And all of them Man's Health lefs difcharge their Excrements regularly ; constant why should Man with Reason to choose, than, and with Choice of all sorts of prepared theirs ?
Diet, Affiftances of being kept warm, Skill of Physicians, &c. digert his Meat worfe, discharge his Excrements with greater Difficulty, and be liable to more Disorders, and more difficult to be fet right, or be fed fat at Pleasure, than any other Creature ? And more now 'than formerly? It cannot be for want of volatile, or active Salts or Spirits, that Man's Stomach digests not so well as those of Brutes; because Brutes and Savages, who
lie put in the Cold, need most of them; and Man. in Cities, Towns, &c. takes in more of them, and more freed, or sharpened than any other Creature of his bigness, or in Proportion ; and becaufe we use a greater Quantity than formerly in Sugar, Spirits, Brandy, Rack, Rum, Wine, Spices, Coffee, Tea, &c. and because Physicians prescribe volatile Salts and Spirits in Cordials, &c. when we are out of Order; and becaufe those who take a leffer Quantity, digest and difcharge better than those who take a greater Quantity. It cannot be for want of keeping our Bodies hot, because Brutes are kept cooler than we;, and those who keep themselves but moderately warm, and much in the open Air, digest better than those who keep themselves hotter and closer. And those who keep themselves hottest, are most troubled with Vapours, &c. It cannot be for Want of Exercise, because most Men use more than Brutes do, if they are left to themselves, Nor can it be in Quantity, becaufe every Brute eats more in Proportion than Man, It cannot be by using too much Sea Salt, because we use much less now than formerly, and Physicians forbid the Use of it in moft Indispofitions, and less of it is