Part IV 
PART IV- 
Of Artificial Matters. 
Sect. I. 
Of Things relating to C HTMISTRT, and to other 
Parts of NATVRAL PHILOSOPHY 
ALL Arts are referred either barely to the Obfervation, 
Or alfo to the Command and Management of their 
Object, for the Ufe of Man. But I muft fpeak of 
thole Particulars here preferv'd, in that Order, as they will 
bear : and fo fhall reduce them to four General Heads, fc, 
fuch as relate to Chymifkry and other parts of Natural Phi- 
lofophy j To the Mathematicks , Mechanic^ , 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 alfo was read a Difcourfe before the Royal Society, 
in which, as I take it, the proportions between the faid parts, 
with divers other Remarques were deliver d. But I meet 
with no Regifter hereof. The different Proportions of the 
faid parts,as they are obfervable in the feveral Vifcera, I may 
have occafion elfe where to reprefent. I (hall now only 
note, That the fixed Salts of Blood above mentioned, are 
three of them Grey, and all but weak. The fourth , vi%* 
that of the ferous part of an Oxes^ although calcined to 
whitenefs 5 yet is not fo ftrong , as That of nioit Vege- 
tables. 
The OIL of TOBACCO dimlled per defcenfum. The 
notable effect hereof upon a Cat, was try'd fome years 
fince before the Royal Society. One or two Drops of it be- 
