Essaij on Sheep. 1 13 



*' day to the pond, and to make it pass slowly, 

 "without stopping there: by this method it 

 '' will be found that the sheep who really want 

 " to drink will be the only ones who will drink. 



" In countries where water is scarce, it fre- 

 " quently happens that the pond, if far distant, 

 " and the flock cannot be driven to it without 

 " being fatigued ; in this case they may pass 

 " many days without drinking; but when fed 

 " only upon dry meat, it must not be delayed 

 " too long. 



" This aliment differs much from fresh grass, 

 *^ in consequence of the loss of moisture by dry- 

 *' ing; yet sheep take daily the same quantity 

 " of solid food, whether in grass or in hay. In 

 " the experiments before mentioned, I found 

 " their appetite perfectly equal, for they eat 

 " eight pounds of grass, or two corresponding 

 " pounds of hay, which I found to be the pro- 

 " duct of eight pounds of grass. The evapo- 

 " ration which is carried on during the making 

 " of the hay, takes off three-fourths of the sub- 

 " stance of grass in fluid particles; thus the 

 " sheep which eats two pounds of hay is de- 

 *' prived of six pounds of liquid aliment, which 

 *' it would have had by eating eight pounds of 

 '■' grass. It supplies a part of this deficiency 

 *' bv drinking about three pounds of water 



15 



