Spontaneous Vitality of Microscopic Animals. 11 



same degree of heat as destroys insects ; all which evince that they 

 are living animals. 



And it is prohable, that other or similar animalcules may be pro- 

 duced in the air, or near the surface of the earth, but it is not so easy 

 to view them as in water; which as it is transparent, the creatures 

 produced in it can easily be observed by applying a drop to a micro- 

 scope. I hope that microscopic researches may again excite the atten- 

 tion of philosophers, as unforeseen advantages may probably be 

 derived from them, like the discovery of a new \vorld. 



