DIFFERENT SYSTEMS. i-,i 



but, by the afliftance of the microfcope, he found 

 the fpermatic animals of the dog in both horns 

 of the uterus : In that part of the uterus which 

 is nearcft the vagina, he difcovered great num- 

 bers, which evidently proves, fays he, that the 

 male femen enters the uieriis, or, at Icalt, that 

 the fpermatic animals of the do^ had arrived 

 there by their own motion, which enables them 

 to pafs over 4 or 5 inches in half an hour. In 

 the uterus of a female rabbit, w^hich had jufl re- 

 ceived the male, he obferved an infinite number 

 of fpermatic animals. He remarks, that the bo- 

 dies of thefe animals are round ; that they have 

 long tails ; and that they often change their fir^ 

 gure, efpecially when the fluid in which they 

 iwim begins to dry up. 



Thefe experiments of Leeuwenhock were re- 

 peated by feveral people, who found them ex- 

 actly confonant to truth. But Dalenpatius, and 

 fome others, who were inclined to exceed 

 Leeuwenhoek in acutenefs of vifion, alledged 

 that, in the femen of a man, they not only found 

 animals refembling tadpoles, whofe bodies ap- 

 peared to be as large as a grain of corn, with 

 tails about four times as long as their trunks, 

 and which moved with great agility ; but, what 

 is rtill more ama'^ing, Dalenpatius faw one of 

 thefe animals break through its coat or cover- 

 ing : It was then no more an animalcule, but a 

 real human body, in which he eafdy diftinguifh- 

 cd the two arms and legs, the breaft and the 



I 2 Jtxead 



