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in a gallon jar full of water, and as 

 much ftrong inflammable air was 

 let up as to fill above one third of 

 the jar. I left it in the garden 

 during fix days, when I found, to 

 my furprize, that it was very far 

 from being correcled ; for one mea- 

 fure of it, with one of nitrous air, 

 occupied 1.80 ; it gave the follow- 

 ing refult by Abbe Fontana's me- 

 thod, 2.58, 3.58 : a chicken, near 

 three weeks old, died in it in the 

 fpace of one minute, 



This refult, fo different from the 

 former, greatly puzzled me, and 

 reflored my hope that the nitrous 

 ten: was without exception, and that 

 I mufi: have committed fome error 

 in the former experiment. 



I was, however, far from giving 



up entirely my fufpicion of the 



failure of the nitrous tefl. I re- 



6 folved 



