Sf WT Ee SS SS. Ixy 
. XVID. Leaves of plants die fooner whenthe 
aD ica oa elaborated by them, is 
feparated from them, p71 
XIX. On the power which vegetables have of 
abjorbing different kinds of ar, 77 
XX. On the bef manner of judging whether the 
plants ave ready to yield their dephlogifticated 
ere | 79 
XXI Conjecture, why fome waters, as diftilled, 
= boiled, and fome others, do not promote, but 
2 é 
objtruét, the operation of plants in yieluing de- 
phlogifticated air, 
AX. Same remarks on the green matter, which 
Settles at the bottom and fides of the Jars, in 
which the water is left /ianding, 9 
XXUI. Jn planting trees for rendering the air 
_ waglefomer, it feems tot to be Quite indiff 
mae what kind of trees are made ufe of, 9 3 
XXIV, The largeft and the more perfec? leaves 
yield more and purer dephli ifticated air than 
XV. Though the diminut.on of the bulk "r 
| nitrous and common air is believed to be an un- 
qucftionabje te of the fo0dne/s of any air; 
| Jet tt muft be allowed, that in _fome kinds of 
sar this teft may fail, ae IF | 
Vi. Air is one of the. mof changeable fub- 
_. flances in nature, and appearing under very 
_ different forms from a variety of caufes, +07 
AXVIL. On the natur 
: € of the air dozing out of 
~. our skin, e429 
Conclufion. 3 127 
S R 
Parr 
