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CHAP. IL 
Of the RUANTITIES afforded by the Parts of fe+ 
veral Plants di/tinétly calcin'd. 
SHALL next fet down fome Tryals, upon one Part 
ofa Plant, as well Organich , as Content, feparated 
from the reft 5 in anfwer to thefe fuppofed Queries, 
Quer. 1. What Proportion doth the Lixivial Salt 
of the Pith or Pithy Part of a Plant, bear to that of 
the Fibrous, or of the Woody Part 2. Or whether is 
D there a Fixed Salt always found in either of theme A 
to which, muft be built upon many Tryals. At pre- 

fa! Yip, 

Pithy Parts; the other upon Flax, confifting almoft‘wholly of the 
Nervous or Towy Fibres: of the Volatile parts whereof, chiefly, I have 
continued (though the fiercenef$ of the Fire confumed part of it ) as 
black, as when it was firft burnt. So ftrangely was the remaining part 
of the sulphur fixed to the Earth 5 that in flying away, it did volati- 
lize and carry that away with it. In this Coal or Cinder, there is not 
the leaft of a Lixévialor other Tufte. And although, upon Tryal I find, 
That the Pith of many Plasts, as of a Cabbage Stalk, will yield fome 
quantity of Lixéeial Salt yet it is probably, that generally, it yields 
lefs than the Wood. 
Of Flax, ibj yields not above 50 Grains of Caput Mortum or white 
Afhes, which are Slt. According to vulgar conceit, it would fem 
to be a very dry Body: yet of 153 parts, 152 are volatile, and being 
diftilled would have been collected into Liquor. Hence alfo appears 
the great and unexpected Variety in the Proportion of the Earthy Parts, 
as well as the other Principles of Bodies. Or elfe, that there are di- 
vers kinds of Earths, even in Plants, of which, as well as of Salts &c, 
fome are volatile. For of ibj of this Plant, there remaineth fixed but 
50 Grains: whereas of 1bj of Rhubarb, there will remain near 1920 
Grains, 7. e. 88 times as much as the former. 
Quer. 2. Iz what proportion is the Lixivial Salt found in the Gumus 
of Plants? and whether is it jielded, more or lefs, by all? For anfwer to 
which, I caufed the Eleven following, of cach two Ounces, to be 
calcin'd, and fo obferved, 
That Common Rofin, yields but one Grain and § of Caput Mortuunt, 
So that {6j will yield but 12 Grains. In this Caput Mort. there is not 
the leaft particle of Salt, it being altogether infipid. : 
Maflick yields gr. 12 of Cap. Mort. But not the leaft part of salf. 
Of this Rofiz, it is obfervable ; That being fet, in a Crucible, within 
the 

