[ 248 J 
i",only burned in it with fuch a de- 
aia gee Of brightnefs that it dazzled 
froyed. 
my eyes,. but it excited-a crackling 
hiffing which accompanies the flame. 
when plunged in pure dephlogifti- 
cated air. Among the plants which 
yielded’ the pureft airs were fome 
aquatic plants and the turpentine- 
trees, from: which I always got air 
of amass pea of purity, fo 
trous air were eres before the 
faturation of the two meafures of 
the dephlogifticated air could be ob- 
tained, and that above {°° of the 
= of the two airs were deftroyed. 
= Too. In‘ September { got from 
youn g leaves of a vine fuch pure 
air that its teft gave the following 
. refult : = f-O7- t,07-+- 1.76> 1-Uoe 
2.335 4 30. 
Tot. And 
