70 . NORTH-CAROLINA GEOLOGICAL SURVEY. 



Potash, 16.210 



Soda, 24.699 



Phosphates of lime and magnesia, 15.150 



Lime, 2.820 



Magnesia, 0.936 



Silica, 12.850 



Sulphuric acid, 10.793 



Chlorine, 10.453 



Carbonic acid, 1.850 



Organic matter, 3.200 -,* 



99.461 



42. The inspection of the composition of the ash of the 

 corn stalk shows that it should not be wasted, inasmuch as a 

 quantity of the most valuable elements would be lost ; it would 

 be equivalent to the wasting of so much bread or corn, inas- 

 much as the whole of the matter may be converted into 

 bread or corn in the process of cultivation. 



The straw of wheat is less rich in phosphates and the alka- 

 lies than corn ; and yet it is entitled to preservation and use 

 as a fertilizer. 



The ash of the straw amounts to 2.660 per cent., and con- 

 sists of 



Silica, 1.235 



Phosphates, 0.422 



Thus the phosphates bear a very small proportion to the 

 silica. 



The complete analysis of the straw of wheat gave me : 



Potash, 22.245 



Soda, 5.195 



Earthy phosphates, 19.600 



Silica, 49.100 



Lime, 3.460 



Magnesia, 0.324 



Sulphuric acid, 0.876 



Chlorine, 0.121 



In a ton of straw the loss which would be sustained by 

 wasting it, amounts,' in pounds, to 



