122 Sir Benjamin Thompson’s Experiments 
To afcertain the quantities and qualities of the airs remain- 
ing in the different waters ufed in this experiment, putting the 
globes feparately over a chafing-difh of live coals, and making 
the water boil, taking care to hold the globe in fuch an in- 
clined pofition as that the air feparated from the water might 
be collected in the upper part of the globe, the airs produced 
were as follows. 
t 
Quantity. Quality. 
By the green water in the globe A, of a cubic inch 280 degrees 
By the green water in the globe B, — — 241 
By the fpring water in the globe C, 7 V(t — — 68 
The waters in thefe experiments were made to boil but for a 
moment ; otherwife, it is probable, more air might have been 
feparated from them. 
Finding that frefh leaves, expofed to the adtion of the fun’s 
rays, in water which had already turned green, caufed pure air 
to be feparated from the water in fo great abundance, I repeated 
the experiment, only, inftead of leaves’, I now made ufe of a 
fmall quantity of conferva rivularis ; when I had nearly the 
fame refult as with the leaves. 
To afcertain the relative quantities and qualities of the airs 
yielded by the green water, when expofed with frefh leaves, 
and when expofed with raw filk; and alfo to afcertain, at the 
fame time, how long leaves, expofed in green water, retain 
their power of feparating air from it, I made, 
Experiment N° 32. 
Two equal globes, A and B (containing 46 cubic inches), 
the former (A) filled with green potatoe water, {trained through 
linen, and four peach leaves; the latter (B) filled with the 
fame potatoe water, {trained in like manner, and 1 7 grains of 
4 raw 
