THIS EEASON WHY. 269 



She dwelleth and abideth on the rock, upon the crag of the rock and tha 



strong place. 



"From thence she seeketh the prey, and her eyes behold afar off. Heryountf 

 ones also suck up blood : and where the slain are, there is she." JOB xxxix. 



of the young animal. When, however, it is able to feed itself by 

 browsing, then the horns begin to grow. 



1070. Why have infants no teeth ? 



Because the presence of teeth would interfere with their suckling, 

 while the teeth would be of no service, until the child could take 

 food requiring mastication. 



1071. Why cannot flesh-eating animals live upon vege- 

 tables ? 



Because the gastric juice of a flesh-eating animal, being adapted 

 to the duty which it has to perform, will not dissolve vegetable 

 matter. 



1072. Why have birds gizzards ? 



Because, having no teeth, the tough and fibrous gizzards are 

 employed to grind the food preparatory to digestion. 



1073. Why are small particles of sand, stone, tyc., found 

 in the gizzards of birds ? 



Because, by the presence of those rough particles, which become 

 embedded in the substance of the gizzard, the food of the bird is 

 more effectively ground. 



When our fowls are abundantly supplied with meat, they soon fill their craw, 

 but it does not immediately pass thence into the gizzard ; it always enters in 

 small quantities, in proportion to the progress of trituration, in like manner, as 

 in a mill, a receiver is fixed above the two large stones which serve for grinding 

 the corn, which receiver, although the corn be put into it by bushels, allows 

 the grain to dribble only in small quantities into the central hole ih the upper 

 mill-stone. Paley. 



CHAPTER LIV. 



1074. Why has the mole hard and flat feet, armed with 

 sharp nails? 



Because the animal is thereby enabled to burrow in the earth, in 

 search for worms. Its feet are so many shovels. 



1075. Why is the mole's fur exceedingly glossy and 

 smooth ? 



Because it smoothness enables it to work under ground without 



