Analyfis of the Air. 19 1 
mon air; by filling two equal tubes with 
thefe different airs, the tubes were 10 inches 
long and fealed at one end ; I placed them 
at the fame time in a cylindrical glafs con- 
denfing receiver, where I compreffed them 
with two additional atmofpheres, taking 
care to fecure myfelf from danger in cafe 
the glafs fliould burft, by placing it in a 
deep wooden veffel, the water rofe to equal 
heights in both tubes. This receiver was 
gently annealed and thereby toughened, by 
being boiled in Urine where it lay till all 
was cold. 
X put alfo into the fame tubes fome new 
made air of tartar, both the tubes ftanding 
in citterns of water 5 the air of one of thefe 
tubes X compreffed in the condenfing en- 
gine for fome days, to try whether in that 
compreffed ftate, more of the air’s elafticity 
would be deftroyed by the abforbing va- 
pours than in an uncompreffed ftate ; but X 
did not perceive any fenfible difference. 
Lemery , in his courfe of chy miftry,/>. 592. 
obtained in the diftillation of 48 ounces of 
Tartar^ 4 ounces of phlegm, 8 of fpirits, 
3 of oil, and 3 2 of fcoria, i. e . two thirds 
of the whole, fo one ounce was loft in the 
operation* 
In 
