CHEMISTRY IN AGRICULTURE AND PHYSIOLOGY. 417 
lacy. I have lately applied it in the recognition of strychnia 
in the urine of a girl poisoned at Peterborough, and the 
results were very satisfactory. They were confirmed by the 
physiological action of the poison, obtained from the urine, 
on frogs. • 
Lastly, I would remark that the carbazotic acid, and 
iodine tests, which Dr. Wormley says he has not seen de¬ 
scribed, are fully discussed in my paper, and drawings of the 
crystalline precipitates are given .*—The Chemical News. 
CHEMISTRY IN ITS APPLICATION TO AGRICULTURE AND 
PHYSIOLOGY. 
By A. S. Copeman, Y.S., Utica, N.Y. 
t Continued^from page 341.) 
The chemical analysis of these three substances has led to 
the wonderful discovery that they contain the same elements 
united in the same proportion by weight, and what is still 
more remarkable, that they are identical in composition with 
the chief constituents of the blood, animal albumen, and 
fibrine. 
The horse or ox may be kept in good health on the dried 
stalks and meal of maize with water ; the principal nutritious 
matters in this simple diet are albumen and starch. 
Liebig gives the following table of principles met with in 
the food, and their uses: 
Plastic Elements of Nutrition. 
Vegetable gluien 
„ albumen 
,, caseine. 
Elements of Respiration. 
Starch 
Sugar 
Eat. 
Analyses show that 100 pounds of wheat contain 55 pounds 
of starch and 15 pounds of albumen; milk contains much 
fatty matter, hutter. Both substances, you observe, contain a 
a large quantity of the elements of respiration. 
At every moment of his life, man is taking into his lungs 
oxygen, which is absorbed by the blood and conveyed to 
every tissue in the body in its passage through the minute 
vessels ; thus the oxygen is brought into direct contact with 
cells containing the compounds of fat or albumen, which it 
XXXIII. 
* Ibid., p. 707, and July 12, p. 37. 
49 
