ANALYSES OF MAIZE- 
199 
17. Analysis of the ash of the cob of the same corn. 
Silica - 
O 
Per centum. 
17-626 
Earthy phosphates 
- 
- 
16-140 
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. 
