C an ] 

 upon my hand in the open air ; as 

 foon as if came out of the lait jar 

 it feemed to grow worfe, and could 

 Hand no more : however it re- 

 covered gradually again* 



45. A fprig of pepper-mint was 

 placed under an inverted jar upon 

 a difti, with fome water upon it, to 

 keep the plant alive, and to fhut off 

 the communication with the air in 

 the jar, and the air without. It was 

 placed in a warm day in a room 

 againft the window towards the fun, 

 from eleven till one o' clock* An- 

 other fprig of the fame plant, and 

 of the fame fize, was put under a 

 fimilar jar, and placed upon the 

 floor far from the windows in a 

 room very well lighted, but in 

 which the fun did not fhine at that 

 time. By examining both airs I 

 found the air of the jar which was 

 P 2 placed 



