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POPULAR SCIENCE MONTHLY. 



Harvey, was brought into general use through his works. It is not 

 to be taken in its full modern significance. With Harvey it meant 

 simply that the embryos of all animals, the viviparous as well as the 

 oviparous, originate in eggs, and it was directed against certain contrary 

 medical theories of the time. 



The first edition of his i Generatione Animalium/ London, 1651, 

 is provided with an allegorical title-page embodying this idea. As 



Fig 1. William Harvey (1578-1657). 



shown in Fig. 2, it represents Jove on a pedestal, uncovering a round 

 box — or ovum — bearing the inscription 'ex ovo omnia' and from the 

 box issue all forms of living creatures including also man. 



Malpighi.- — The observer in embryology who looms into prominence 

 between Harvey and Wolff, is Malpighi. He supplied what was greatly 

 needed at the time — an illustrated account of the actual stages in 

 development of the chick from the end of the first day to hatching, 

 shorn of verbose references and speculations. 



His observations on development are in two separate memoirs, both 



