INTRODUCTION. 3 



putation of a groundlefs Supposition : 

 And yet imperfect as it is, it wants 

 not Inftances to prove, that the pe- 

 culiar Inhabitants of feveral Portions 

 of Matter often bear a near Refem- 

 blance to each other, tho' they differ 

 extreamly in Magnitude. 



The Extreams of Great and Little, 

 as far as our Conception aided by 

 Experience can trace them, are im- 

 meniely diftant from each other - y 'tis 

 neverthelefs not unreafonable to fup- 

 pofe, that the whole Sphere of our 

 Knowledge from known Objects of 

 the greateft Dimenfions to the mi- 

 nuteit microfcopical Animalcule, a 

 Million of which are lefs than a 

 Grain of Sand, would appear but a 

 Point, if it could be compared with 

 the real Bounds of Nature, as much 

 as a little Ant-hill in the Suppofi- 

 tion of reafonable Emmets would 

 appear to its Inhabitants upon Com- 

 parifon, an Infiniteftmal of the terra- 

 queous Globe. 



A microfcopical Anima! may there- 

 fore in Shape and relative Magni- 

 tude be to numberlefs Inferiors, v/hat 

 B 2 an 



