3^2 Mr. Henry on the Experiments made with 



feveral others, and placed in Nooth's machine, 

 where it was continued till the loth of May, 

 The cfferveicence was frequently renewed for 

 the firft four days, then twice, and afterwards 

 once a day, but the difcharge of air was con- 

 tinually g'^ing on. It continued ten days with- 

 out any figns of decay j and, when taken out 

 of the machine on the 14th day, though fome 

 of the older flowers were fading, the others were 

 as frcfn and blooming as when firft put into 

 the veflel. More lb than thofe of the other 

 plants which had been purchafed the fame day, 

 and had been planted in the garden. The body 

 of the plant was green, fucculent and unde- 

 cayed. The air excinguidied flame, and, on 

 trial, was t fixed air j and during feveral days, 

 the proportion of fixed air mufl: have been larger. 



But confined in vefiels of fixed air; or even 

 in Nooth's machine, with the upper part and 

 ♦^roved ftoppcr put on, plants died fooner than 

 in common air. The air meafured was \ fixed 

 air. 



I am informed that an ingenious philofopher of 

 Geneva has made fome experiments, in which he 

 has proved, not only, that phlogifton is the food of 

 plants, but alfo, to the fatisfadtion of Dr. Priefl- 

 ley, that it is in the form of fixed air, in proper 

 proportion and place, that this pabulum is ad- 

 miniftered. The latter is the whole that we con- 

 tended fori and, which, we thought, we had 



fatis- 



