152 



have been instances of men who had this property* 

 Dr. Slare gives us a particular account of one whom he 

 knew at Bristol. u lie begins," says he, u to chew 

 his meat over again, within a quarter of an hour after 

 n?cals. This chewing, after a full meal, lasts an hour 

 and a half. If he goes to bed soon after a meal, he 

 cannot sleep till the usual time of chewing be over. 

 The victuals returned, taste more pleasantly than they 

 did at first. Bread, iiesh, cheese, and drink, are of 

 much such a colour as they would be if mixed together 

 in a mortar. His victuals lie heavy on his stomach till 

 they have passed this second chewing. He was thus 

 ever since he can remember. His father does the same 5 

 but in small quantities." What a mercy is it that we 

 have not more such instances ! For how much of our 

 precious time would it consume! 



5. The situation, number, and conformation of the 

 cyts in various animals, is wonderfully adapted to 

 their various circumstances. In several the eye looks 

 rhidly forward, but so as to take in nearly the he- 

 tnisphcre before it. In others, the eyes are so placed 

 -as to take in nearly a whole sphere. In some, they 

 are so fixed as to look chiefly behind, so that they sec 

 their enemy following them ; so in rabbits and hares : 

 whereas in dogs they are more forward^ to look after 

 their prey. 



Generally the head is moveable for the sake of the 

 eyes, and the eyes themselves moveable every way. 

 VVhcre it is not so, other expedients are found to an. 

 swer the same end. Thus in some creatures the eyeg 

 are set at a distance from the head, to be moved this 

 way or that : as in snails, whose eyes are fixed to the 

 end of their horns, or rather of the optic nerves which 

 are sheathed therein. In other creatures, whose heads 

 and eyes are immovcable, this is made up by the num* 

 ber of eyes. So spiders, which cannot move their 

 head, have four, six, or eight eyes, all placed in the 

 front of the head (which is round) like a locket of 

 diamonds. 



