C 82 ] 



only when placed in the fun % 

 which obfervation ferved me as 

 a good index, whether thofe plants 

 which have experienced nearly the 

 fame influence of the fun as the 

 green matter, were fit to yiekl de- 

 phlogifticated air. The more brifk 

 you iee thefe hubbies rife, the 

 quicker your plants will give theirs* 

 But this manner of judging can 

 only be of fervice in the morning ; 

 for in the middle of the day all 

 leaves of plants, even thofe which 

 were kept in a very dark place, re- 

 vive fo quickly, that they feem not 

 to (land fhort in an obfervable way 

 with thofe which were conftantly 

 in the open air. 



SEG 



