ANALYSES OF MAIZE. 199 



17. Analysis of the ash of the cob of the same corn. 



Per centum. 



Silica 17-626 



Earthy phosphates - - - - - 1 6 • 140 



Phosphates of the alkalies .... 4 "693 



Magnesia 0-240 



Lime 0-250 



Potash 29-693 



Soda 8-768 



Chlorine 10-212 



Sulphuric acid 11-332 



98-954 



The analyses of the Rocky Mountain corn, of the Pennsylvania Dent sweet corn, and of 

 the middle size 8-rowed yellow corn, were made from crops which grew in 1847. The 

 analyses were conducted with as much care as in any of the subsequent cases ; but the ash 

 or materials were not in a condition as pure, and free from coal as the latter. As a whole, 

 too, there are more discrepancies in the results, especially in the grain ; and greater losses 

 were sustained, in consequence of leaving out of the determination the phosphates of the 

 alkalies. Still I am satisfied that the general results are worthy of confidence, and hence 

 ought not to be omitted in consequence of a loss in the analysis, which seems to be too 

 great for a work which is conducted with care, and after the most approved modes. It is, 

 however, mostly in the grain that these remarks apply, and it would have been easy to have 

 supplied the losses by calculation ; but the rule which has been adopted, is, to note the 

 actual results, and to take nothing for granted, unless it has been for organic matter or 

 carbonic acid ; and these have in most instances been determined, for the purpose of 

 confirming the accuracy of results, or for satisfying our minds as to the correctness of the 

 whole work. 



THE ROCKY MOUNTAIN CORN. 



This variety has its kernels enveloped in a husk. The cob is loose and spongy. After 

 a few years' cultivation, its husk disappears, and it differs in no important point from some 

 one of the common varieties now under cultivation. There are two kinds of the Rocky 

 Mountain corn. The one removed the fartherest from the cultivated varieties, has its 

 kernels arranged on a panicle like oats. 



