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PART IV. Of Artificial Matters.
SECT. I. Of Things relating to CHYMISTRY, and to other Parts of NATURAL PHILOSOPHY.
ALL Arts are referred either barely to the Observation, Or also to the Command and Management of their Object, for the Use of Man. But I must speak of those Particulars here preserv'd, in that Order, as they will bear: and so shall reduce them to four General Heads, sc. such as relate to Chymistry and other parts of Natural Phi∣losophy; To the Mathematicks, Mechanicks, and Anti∣quity.
The Phlegme, Oil, Spirit, Volatile, and fixed Salts, both of the Serous, and Grumous Parts of HUMANE BLOOD. Together with the Oil, Volatile, and fixed Salts, of that of an OX. Prepared, and given by Dr. Walter Needham. By whom also was read a Discourse before the Royal Society, in which, as I take it, the proportions between the said parts, with divers other Remarques were deliver'd. But I meet with no Register hereof. The different Proportions of the said parts, as they are observable in the several Viscera, I may have occasion else where to represent. I shall now only note, That the fixed Salts of Blood above mention'd, are three of them Grey, and all but weak. The fourth, viz. that of the serous part of an Oxes, although calcined to whiteness; yet is not so strong, as That of most Vege∣tables.
The OIL of TOBACCO distilled per descensum. The notable effect hereof upon a Cat, was try'd some years since before the Royal Society. One or two Drops of it be∣ing