148 VETEEINAEY HYGIENE 



impossible that it can ever grow into anything but a long- 

 legged, narrow-chested, light-bodied weed, utterly useless 

 for any purpose. No better example can be followed in 

 the matter of feeding foals than that set by the breeder 

 of blood stock. The effects of liberal feeding are here 

 wonderfully shown ; a two-year-old thoroughbred horse is 

 as fully furnished as a half-bred one is at four or five years 

 of age ; nothing but good feeding has produced this. 



CALOULA.TION OP DIETS. 



The following table gives the composition of all ordinary 

 articles of diet, and admits of the digestible constituents 

 being calculated. One or two examples of its working may 

 here be given. 



Example i. — How much proteid matter is contained in 

 12 lbs. of the best meadow hay ? 



11-7x12 = 140-4-=- 100 = 1-404 lbs. 



Example ii. — How much of the proteid matter in 12 lbs. 

 of the best meadow hay is digestible ? 



7-4x12 = 88-8-^100= -888 lb. 



Example iii. — How much proteid matter can a cow 

 obtain from 30 lbs. mangels ? 



l-lx30 = 33-0^100 = -33 1b. 



Example iv. — How much of the cellulose in wheat straw 

 is digestible ? 



22 per cent. 



Table for Calculating Diets. 



This table gives the average percentage composition of 

 ordinary food-stuffs, also the percentage of each constituent 

 digested.* 



* In this table, which ia compiled from Wolff, the crude albumen 

 represents the total nitrogen-containing substances in the food. 



The crude fibre in the first half of the table represents both cellulose 

 and lignm, in the second half of the table ic represents pure cellulose 

 only. 



The nitrogen, free extract represents every substance not containing 

 nitrogen other than cellulose and fat. 



Digitized by Microsoft® 



