t 61 3 



that they had a very remarkable 

 power to foul a great body of air, in 

 which they were flint up, to fach a 

 degree, that two dozen of fmall 

 French beans, placed in a jar hold- 

 ing two pints, had rendered in one 

 night the air in the jar abfolutely 

 poifonous, fo that a young chicken 

 placed in it was killed in lefs than 

 twenty feconds. I found even this 

 deleterious influence of beans upon 

 air to furpafs the power of plants, 

 which are known to be of a poi- 

 fonous quality. See experiments 

 75 — 91, and principally experi- 

 ments 88 and 89. 



Ripe mulberries, filling one-third 

 of ajar, and placed in the fun during 

 four hours, had fo much fouled the 

 air within the jar that a candle 

 would not burn in it. 



