No. 4.] FEEDING OF DAIRY COWS. 



125 



applies to cows and calves. "We have some cows that are 

 absolutely lazy towards milking, from having been fed on 

 the wrong food when they were young, — constitutional 

 laziness from which they can never recover. 



The body is mainly composed of these things, water, 

 albuminoids, carbohydrates, fats. While my body is com- 

 posed of certain substances, I, like other living organisms, 

 need fuel to keep up the heat. There are almost no carbo- 

 hydrates in the body itself; they are its fuel. 



Chart No. 2. 

 Composition of Nutrients, in Percentages. 



The albuminoids, fats and carbohydrates come from four 

 elements or sources. Albuminoids only of the three con- 

 tain nitrogen. I would not have shown some of these 

 charts, after that clear and comprehensive lecture this morn- 

 ing, except to make my own address as clear and serviceable 

 as possible. Four-fifths of the atmosphere everywhere may 

 be termed nitrogen. The albuminoids contain sixteen per 

 cent of it, and if yon can grow any sort of a plant that 

 will glean it from the atmosphere, then you may obtain it in 

 such a form that the cow first, and the man afterwards, can 

 use it as food. Hence when you say that people cannot live 

 on air, the remark requires some qualifications ; because, 

 when a man is wise enouijh to manage the agricultural 

 agents and agencies of nature, he will live largely on air, 

 or on what came from air. He has been doing it in the past, 

 l)ut he was not able to control the means intelligently. 



I was pleased to hear the learned lecturer state last even- 

 ing that in his judgment skimmed milk was far more valuable 



