TUB REASON WHY: 



From an eye of tenderness, 



Let heavenly pity fall." YOUNG. 



99. Why have tears a globular form? 



Because the superfluous fluid secreted by the eye, of which fluid 

 tears are composed, is discharged through a hole in the bone, of 

 about the circumference of a goose quill, in these the tears become 

 moulded to this form. 



100. What is the form of the stomach ? 



The stomach has the shape of the pouch of a bag-pipe, lies across 

 the body ; and the passage by which the food leaves it is some- 

 what higher in the body than the orifice by which the food enters ; 

 so that it is by the contraction of the muscular coat of the 

 stomach, that the contents having undergone the application of 

 the gastric juice, are gradually pressed out. 



101. Why is the free action of the pores of 

 the skin essential to the health of the body? 



Because they act as a species of pipes through 

 which the expended refuse matter is conveyed 

 from the body. These tubes open through the 

 cuticle or outer skin, and descend into the fine 

 or underneath skin, and then form themselves 

 into a coil as seen in the drawing. These tubes 

 are hollow, like a pipe-stem, and their inner 

 surface consists of wonderfully minute capillaries 

 filled with impure venous blood. The capillaries 

 of these tubes through the whole skin of the 

 body are thus constantly exhaling the noxious 

 and decayed particles of the body. It is calcu- 

 lated that about three or four pounds of waste 

 matter pass off through the skin every twenty- 

 four hours. 



102. Why is watered milk the most suitable food for the 

 nourishment of the infant? 



Because this aliment has a close analogy to blood, and the 

 greatest amount of nutrition is therefore afforded in an agreeable 

 forin, and by an easy method, whereas any other mode of supplying 



