filled with young blood, than he leaped up as from 

 sleep, shook himself, and ran up and down as lively 

 and active as a puppy. In France the experiment has 

 been made upon men, and with as surprising success. 

 What pity, that so important an experiment should 

 ever fall into disuse; that it is not still repeated upon 

 proper occasions ; especially where all other means 

 tail. 



11. It cannot be denied that physicians hare signal- 

 ly improved this branch of philosophy, as they have 

 continual opportunities of making new discoveries in. 

 the human body. In diseases themselves, the wonder- 

 ful wisdom of the Author of Nature appears; and by 

 means of them many hidden recesses of the human frame 

 are unexpectedly discovered. The powers of medicines 

 also variously exerting themselves, lay open many se. 

 erets of nature. 



1C. And ho\v many things in all bodies, as well as 

 in the human, which eluded all the art and industry of 

 the ancients, have the moderns discovered by the help 

 of microscopes ? Although these are not properly a 

 modern invention, it being certain something of this 

 kind was in use many hundred* years ago. There are 

 several works of great antiquity still extant; the beau- 

 ties of which cannot even be discerned, muca less could 

 they have been wrought by the finest naked eye which 

 ever was in the world. Such is that seal which was for- 

 merly in the cabinet of the late King of France,allowed 

 to be at least 1500 years old, six. tenths of an inch 

 long, and four broad, which to the naked eye presenti 

 only a confused groupe, but surveyed with a micros- 

 cope, distinctly exhibits trees, a river, a boat, and 

 sixteen or seventeen persons. 



13. Now whatever assists us in searching out the 

 structure of a human body, equally helps us to find out 

 the nature and properties of other animals. Hence in 

 these likewise we have received great light, from ana- 

 tomical and microscopical observations. Those espe- 

 cially who have bestowed their whole time and thoughts 

 on one kind of animal', (as Dr. Willoughby, on fishes, 



