286 



Fcnh and Feeding. 



evaporation of water through the skin and luugs. Tlie propor- 

 tion of the food employed to produce heat is thus increased, while 

 the proportion appearing as work is diminished. There are other 

 mechanical reasons why rapid motion generally consumes more 

 power than slow motion, even when the distance traveled and the 

 weight moved are the same. Grandeau gives tables ^^h owing the 

 temperature of the body of the horse before and after work. 

 When the work performed was at all severe, a very distinct rise 

 in body temperature was observed — from 2" to 4" Fahr. 



447. Water drank by horses. — Grandeau and Leclerc ' report 

 the following quantities of water drank by two horses under dif- 

 ferent conditions: 



Horse A. Horse B. 



Lbs. daily. Lbs. daily. 



Walking, performing no labor 24.9 30.7 



Walking, performing labor 28.9 3.5.4 



Trotting, perfomiing no labor 31.3 27.6 



Trotting, performing labor 52.0 50.7 



448. Loss of weight during work. — Grandeau and Leclerc's in- 

 vestigations ' furnish abundant material for studying the loss of 

 weight of horses and the quantities of water drank during differ- 

 ent kinds of work. The following are some of the results: 



Loss in iceight of horses during work and wJwn at rest — GrandeoM 

 and Leclerc. 



The difference between the loss in weight of the horse when 

 walking and trotting, or that obtained when working and idle, is 



* Loc. cit. 

 *Ann. Sci. 



Agr., 1888, II, p. 276. 



