466 Agi'iculfMral Chemistry. — Pig Feeding, 



undesirable; but is' perhaps as small as we can hope for in any 

 extensive experiments in which we have to deal with the subtle 

 principle of animal life. 



We have already stated that the articles of food selected for 

 the First Series of experiments were — 



1. A mixture of equal parts of Bean and Lentil meal, this 

 being taken as the highly nitrogenous food. 



2. Indian corn-meal, as containing, compared with the former, 

 only a small quantity of nitrogen, but a comparatively large 

 amount of the non-nitrogenous substances of the starch series, 

 and also more of fatty matter. It is these various non-nitrogenous 

 substances that are supposed more peculiarly to serve for the 

 respiratory process, and for the formation of fat in the animal body. 



3. Bran — characterised as containing a considerable amount of 

 inert woody fibre and mineral matter, and comparatively but 

 little of starch, sugar, and the like ; it is not, however, deficient 

 either in nitrogenous or fatty matters, being in these respects 

 intermediate between the other two descriptions of food. 



From these three standard food-stuffs, twelve dietaries were 

 arranged, as follows : — 



Bean and Lentil mixture, ad libitum. 

 2 lbs. per pig per day of Indian-corn meal ; and Bean 

 and Lentil mixture, ad libitum. 



2 lbs. of Bran per pig per day ; and Bean and Lentil 

 mixture, ad libitum. 



2 lbs. of Indian-corn meal, and 2 lbs. of Bran per pig 

 per day ; and Bean and Lentil mixture, ad libitum. 

 Indian-corn meal, ad libitum. 



2 lbs. of Bean and Lentil mixture per pig per day ; and 

 Indian-corn meal, ad libitum. 



2 lbs. Bran per pig per day ; and Indian-corn meal, ad 

 libitum. 



2 lbs. Bean and Lentil mixture, and 2 lbs. of Bran per 

 pig per day ; and Indian-corn meal, ad libitum. 

 2 lbs.* of Bean and Lentil mixture per pig per day ; and 

 Bran, ad libitum. 



2 lbs.* of Indian-corn meal per pig per day ; Bran, ad 

 libitum. 



2 lbs. Bean and Lentil mixture, and 2 lbs. Indian-corn 

 meal per pig per day ; Bran, ad libitum. 

 Bean and Lentil mixture, Indian-corn meal, and Bran, 

 each separately, and ad libitum. 



* Increased to 3 lbs. after the first period of 14 days. 



Pen 



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Pen 



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Pen 11. 



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