Volume 1

Elements of the theory and practice of chymistry / Translated [by Andrew Reid] from the French of M. Macquer.

  • Macquer, Pierre Joseph, 1718-1784.
Date:
1758
Catalogue details

Licence: Public Domain Mark

Credit: Elements of the theory and practice of chymistry / Translated [by Andrew Reid] from the French of M. Macquer. Source: Wellcome Collection.

    170/464 (page 144)
    animal, but pafs through its ftrainers without re¬ ceiving any alteration; fuch as the neutral laits which have a fixed alkali for their balls, and particularly the fea-falt which happens to be jin the food of animals, whether it exift therein natu¬ rally, as it does in fome plants, or whether the ani¬ mals eat it to pleafe their palates. The faliva, the pancreatic juice, and efpecially the bile, are faponaceous liquors, that is, they con- fifi: of faline and oily particles combined together ; fo that being themfelves diffolved in an aqueous li¬ quor, they are capable of diflolving likewife the oily parts, and of rendering them mifcible with water. Laftly, the blood being the receptacle of all thefe liquors partakes of the nature of each, more or lefs in proportion to the quantity thereof which it contains. §• III. The Analysis of Mineral Substances. Minerals differ greatly from vegetables, and from animals ; they are not near lo complex as thofe organized bodies, and their principles are much more fimple ; whence it follows that thefe principles are much more clofely connefted, and that they cannot be feparated without the help of fire ; which not having on their parts the fame ac¬ tion and the fame power as on organized bodies, hath not the fame ill efiect on them ; I mean the e fie ft of changing their principles, or even deftroying them entirely. 1 do not here fpeak of pure, vitrifiable, or refrac¬ tory earths ; of mere metals and femi-metals ; of pure acids ; or even of their fimplefl combinations, fuch as lulphur, vitriol, alum, fea-falt: of ail thefe we have faid enough. vV e are now to treat o! bodies that are more com¬ plex, and therefore more fufceptibleof decompoficion. 6 Thefe