W. Oz ieee on American Maize. 855 
liminary treatment. Ordinary cotton batting will also need pu- 
ification. A portion of that which I used, when dried at 100° 
C. and treated with ether, gave 0-9 per cent of a fatty substance, 
which on cooling had the appearance of tallow or stearine. 
Great care and considerable time are required to remove the 
last traces of ether and moisture from the fat and the flask con- 
taming it, before weighing. I have always used, in weighing, 
a counterpoise flask similar to the one in which the fat was col- 
lected. Below are my results : 
Fat, per cent. 
A. B. C. 1; 
L IL, L IL. L I. L tT. 
576 558 442 441 462 438  T87 715 
L. Lenz (Henneberg’s Jahresbericht, 1866-7, p. 151), has 
published examinations of six varieties of maize, in which he 
Weight of outer hard portion, endosperm,..--- 30°211 grm. 76°43 
“© inner soft  “ embryo with some 
endosperm, 9°321 grm. 23°57 
Total, 39°532 grm.100°00 
The former portion was ground and the amount of water and 
fat determined as above, with the following result : 
Water 15°92 per cent. 
Fat, : ‘ 5 ag Belin hs 
Lenz found in the endosperm of the maize examined by him 
from 0°75 to 1-96 per cent of fat, the mean of his six results 
was 1-32 per cent. The water-content of the endosperm he an- 
alyzed was less than the above, viz: from 9 to 10 percent. The 
larger percentage of moisture in my sample was due to the fact 
that the corn had been standing for some time, and w s like- 
Wise ground in a very damp air. It appears then that while the 
endosperm is very much poorer in fat than the chit, it is never- 
theless not entively free from this material. The ether-extract 
from the endosperm had much the same appearance as that from 
the entire kernel obtained in the ordinary estimations. : 
Determination of Albuminoids.—The amount of nitrogen* 
* The nitrogen determinations gave the following figures: 
A, B. C. 
D. 
q. iL L It. L ; tL L 6 
163 154 166 155 188 192 176 1°79 
