C 227 ] 



had flood about three hours in the 

 room, the air of the jar was fo 

 much infedled that a candle could 

 not burn in it. 



The fame effect was obtained 

 with a flmilar quantity of the fame 

 flowers expofed during three hours 

 in the futi-mine. 



70. A fimilar quantity of thefe 

 fweet-fcented flowers were kept in 

 a pint jar over-night ; when they 

 had fo much fouled the air that an 

 animal mult, have died in it, one 

 meafure df it and one of nitrous air 

 occupied 1.68. 



All kinds of flowers had nearly 

 the fame effect. All of them fouled 

 the air more or lefs, either in a 

 room or in the open air, as well by 

 day as in the night, equally in fun- 

 fhine as in a ihaded place. 



2 SEC- 



