SECT. 3] AND EIGHTEENTH CENTURIES 151 



coagulated mass exists, said Harvey, it ought to be possible to find 

 it by dissection, and this was what he tried to do. It soon became 

 plain, as may be read in Ex. lxviii, not only to Harvey but to the 

 King and the King's gamekeepers, that no such coagulum existed, 



^t^^^^^jr. S>'^'^^^ ^>^T*-^^J-^ r "^ 

 ^^^ A--r> >^r'-/f >^'^^ S" ^,-^^ ^ , ■ 



x> f.^^ ^^^^^/s S^^ . rr- f 



Fig. 7. Manuscript notes of Dr William Harvey. 



and the result was made still more certain by means of segregation 

 experiments which the King carried out at Hampton Court. Ac- 

 cordingly there was nothing to be done but to abandon all the older 

 theories completely, and have recourse to some sort of hypothesis 

 in which an aura seminalis, an "incorporeal agent" or a "kinde 

 of contagious property" should bring about fertilisation. This was 



