[ 260 



ing, when it was examined, and 

 found to be fo poifonous that a 

 chicken, three weeks old, died in 

 it in lefs than a minute. It proved 

 alio very bad by the nitrous tell ; 

 for one meafure of it with one of 

 nitrous air occupied 1.80 ; and the 

 refult of Abbe Fontana's method 

 was 2.58 ; 3.58. 



This refult, being quite different 

 from the refult in Experiments 1 o8 3 

 109, no, and in, reftored my 

 hope that fome blunder had been 

 committed in the experiments juft 

 mentioned ; I refolved therefore, 

 if poflible, to difcover this myftery.- 



113. Two pints of ftrofig in- 

 flammable air (which could not be 

 diminimed by nitrous air) were let 

 up in a gallon jar containing fome 

 plants, with roots and all, of PerJ& 

 carta urens, which was placed in 

 3 the 



