{ 237 j 
whether fuch a fmall number of 
them could affect obfervably fuch a 
great body of air, ; Fwas aftonifhed 
to find they had fo much affected 
the airjthat it was tendered ‘quite 
unwholefome for breathing; it ex- 
tinguifhed a flame; and ‘oné mea- 
fare of it with one of nitrous air 
occupied 1.34. 
gi. Three fmall unripe walnuts 
were oat under, a saa or about three 
{poiled 4s 'to extinguifh flame, Its 
teft was, that. one meafure of: it with 
‘one of ‘nitrous air occupied: 1. 545 
