Of Vegetation . 35 £ 
The like plants placed in the fame man- 
ner feparately, in the diftilled airs of Tar- 
tar and Newcaftle coal, foon faded; yet a 
like plant confined in three pints of air, a 
quart of which was diftilled from an Oxs 
tooth, grew about two inches in height, and 
had fome green leaves on it, after 6 or 7 ’ 
weeks confinement. 
Finding that a frefh plant could not live 
in the air, which had been for feveral months 
infe&ed by the mint which was placed in 
it the 19 th of June h inftead of a plant I 
placed in that air a mixture of powdered 
Brimftone and filings of Iron moiftened with 
waters this mixture abforbed four cubick 
inches of this air. 
Experiment CXXIIL 
In order to find out the manner of the 
growth of young (hoots, I firft prepared the 
following inftrument, viz. I took a fmall 
flick a, (Fig. 40.) and at a quarter of an 
inch diftance from each other, I run the 
points of five pins, 1, 2, 3, 4, 5, thro' the 
flick, fo far as to ftand j,. of an inch from the 
flick, then bending down the great ends of 
the pins, I bound them all faft with waxed 
thread ; I provided alfo fome red lead mixed 
with oih In 
