CENTURY I. 59 



not only for the producing of birds and beasts of 

 strange colours ; but also for the disclosure of the 

 nature of colours themselves : which of them require 

 a finer porosity, and which a grosser. 



Experiment solitary touching the nourishment of living 

 creatures before they be brought forth. 



9 L It is a work of providence, that hath been 

 truly observed by some, that the yolk of the egg con- 

 duceth little to the generation of the bird, but only 

 to the nourishment of the same ; for if a chicken be 

 opened, when it is new hatched, you shall find much 

 of the yolk remaining. And it is needful, that birds 

 that are shaped without the female s womb have in 

 the egg, as well matter of nourishment, as matter of 

 generation for the body. For after the egg is laid, 

 and severed from the body of the hen, it hath no 

 more nourishment from the hen, but only a quick 

 ening heat when she sitteth. But beasts and men 

 need not the matter of nourishment within themselves, 

 because they are shaped within the womb of the 

 female, and are nourished continually from her 

 body. 



Experiments in consort touching sympathy and antipa 

 thy for medicinal use. 



95. It is an inveterate and received opinion, that 

 cantharides applied to any part of the body, touch 

 the bladder and exulcerate it, if they stay on long. 

 It is likewise received, that a kind of stone, which 

 they bring out of the West-Indies, hath a peculiar 



