344 SOILS TESTED FOR SOLUBLE SILICA AND THE PHOSPHATES. 



We subjoin to the foregoing analyses a statement of the several tests, made for the 

 purpose of ascertaining the presence of soluble silica and the phosphates. 



1. Marcellus slate soil, Manlius. 100 grs. gave 



Soluble silica 0-15 



Phosphates a trace. 



2. Soil of Mr. Geddes's farm, Fairmount. 100 grs. gave ^ 



Soluble silica 0-19 



Phosphates appreciable. This is one instance in which the phosphates have been 

 detected in this peculiar soil. 



3. Mountmorris, or soil of the Genesee flats. 100 grs. gave 



Soluble silica 4-167 



Phosphates not appreciable in 100 grs. It is possible, however, that 100 grains, 



freed of water and organic matter, would give indication of the presence of 



phosphates. 



4. Cayuga clay, cropping out on Cayuga lake, and used for brick. 



Soluble silica, a trace. 

 Phosphates not appreciable. 



5. Harmon's wheat soil, Wheatland. 



Soluble silica evident in 100 grs. 



The phosphates not appreciable in 400 grs. 



6. Soil from the farm of Mr. E. Ball, Hoosic falls. 



■ . Soluble silica, a trace. 



Phosphates, a trace. 



7. Soil in which the Kalmia latifolia grows well : situated upon the ravines underlaid by the 



Marcellus slate. 



Soluble silica _ 0-05 



Phosphates inappreciable. 



8. Soil from the farm of Mr. Levi Hopkins. 



Soluble silica 0-05 



Phosphates a trace. 



9. Albany clay. 



Soluble silica, a trace. ■' 



Phosphates quite evident. 



10. Niagara clay. 



Soluble silica, a trace. 



Phosphates not appreciable. 



11. Peat, from Hoosic falls. 



Soluble silica 0-32. 



Phosphates not appreciable. 



