Mf. Henry on the Experiments made withy &c. 357 



That which before us lies, in daily life. 

 Is the prime wifdom ; what is more is fume. 

 Or emptinefs, or fond impertinence. 

 And renders us in things, that moft concern, 

 Unpradlis'd, unprepar'd, and ftill to feek. 



Par. Loft. Book VIII. 



I 



Observations on the Influence of Fixed Air 

 c« Vegetation ; and on //^^ probable Cause 

 of the Difference in the Results of various 

 ExPERiMEN'TS made on that Subject; in a 

 Letter fro7n Mr. Thomas Henry, F. R. S. 

 to Thomas Percival, M. D. F. R. S. and 

 S. A. Read May 14, 1784. 



DEAR SIR, 



T T is now many years fince, from fome experi- 

 -*■ ments which you had made on the efFeds of 

 fixed air, applied to the leaves and roots of 

 plants, you, as appeared to me at that time, juflly 

 concluded that fixed air affords a pabulum for 

 plants, which is equal to the fupport of their life 

 and vigour, for a confiderable time. Some of 

 thefe experiments were feemingly con trad iflory 

 to the refults of thofe related by Dr. Prieftley in 

 his firfl: volume. The dodor therefore requefted 

 that you or I would repeat them in vcfTels con- 



A a 3 taining 



