16 Introductory References. 



A number of topics that seemed to require it, are inci- 

 dentally discussed* in different parts of the work ; a spe- 

 cial chapter being devoted to the results of fattening 

 cattle at mature and immature ages — chapter XIV. — and 

 to the necessity of bulk, in Air for breathing, and in feed 

 for mechanical influence — see chapter XV. — as well as ali- 

 ment. AVhile the paramount influence of activity in de- 

 veloping muscle, power, and food value is shown by con- 

 trast and comparison, in chapter XIV., Book II., on Train- 

 ing, feeding and breeding, the subjects discussed being all 

 named in the general Index of the work. 



*The losB from Abortion in cows was estimated at $4,800 000, years ago, in 

 nine dairy counties in New Yorlc. In the other dairy States, together, the 

 loss from Abortion is probably as great. Bat call the total loss from Abortion 

 in cows $5,000,000 a year, with $3,000,000 a year loss In muscle and food value, 

 and $3,000,000 a year more from loss of hogs by cholera, these items make 

 $10,000,000 yearly loss, most of which can be avoided by preventive manage 

 ment, the nature of which is suirgestcd in tliis work. 



