96 Sir Benjamin Thompson’s Experiments 
them the following fubftances, and expofed them all, at the 
fame time, to the action of the fun’s rays. 
In the globe N° i. I put 15 grains of fheep’s wool, 
N° 2. 15 grains of Eider down, 
N° 3. — — 15 grains of the fine fur of a Ruf- 
fian hare, 
N° 4. 15 grains of cotton wool, 
N° 5. 15 grains of lint, or the ravelings 
of fine linen, 
N° 6. 15 grains of human hair; thefe 
fubftances being all well wafhed, and being thoroughly freed 
of air, by being wet before they were put into the globes. 
The refults of thefe experiments were as follow’s. 
Experiment N° 6. 
The globe N° 1 . which contained the fheep’s wool, did not 
begin to furnifh air in any’ confiderable quantity till the third 
day of its being expofed to the action of the fun’s rays ; and 
feveral days of cloudy weather intervening, I did not remove 
the air till the eighth day, when I collected if cubic inch, 
which, proved with nitrous air, gave 1^ + 3^= 1,28, or 272 
degrees. 
The wool at no time furnifhed more than one-third part of 
the air, which an equal quantity of filk would have furnifhed 
under the fame circumflances. 
The water was very faintly tinged of agreenifh hue. 
Experiment N° 7. 
The water in the globe N° 2. with the Eider down, began 
almoft immediately to furnifh air, and continued to yield it 
during the whole time of the experiment, nearly in as large 
quantities 
