152 



SIR H. Davy's agricultural chemistry. 



phuric acid is detected in salts by the 

 dense white precipitate it forms in solu- 

 tions of baryta. Muriatic acid by the 

 cloudiness it communicates to solution of 

 nitrate of silver, and when salts contain 

 nitric acid, they produce scintillations by 

 being thrown upon burnino; coals. 



As no applications have been made of 

 any of the neutral salts, or analogous 



compounds found in plants, in a separate 

 state, it will be useless to describe them 

 individually. The following tables are 

 given from M. Th. de Saussure's Re- 

 searches on Vegetation, and contain re- 

 sults obtained by that philosopher. They 

 exhibit the quantities of soluble salts, 

 metalic oxides, and earths afforded by the 

 ashes of different plants. 



Coiiiinued on ne.xt page. 



