130 CELL THEORIES. 



be raised against him than against another who 

 should maintain that the migrating cells are epi- 

 thelia. Recklinghausen has advanced a theory 

 respecting the conjugation of cells, which, however, 

 on account of its brevity, scarcely allows us to 

 judge of its value." The theory of Recklinghausen 

 refers to conjugation between different elements of 

 blood. 



The part taken by Dr. Beale in the advance 

 of the cell conception has been one of great im- 

 portance, and is worthy of full consideration. The 

 great merit of Dr. Beale appears to me to lie in 

 pointing out that the cell-wall is in all instances an 

 after-growth, and that the vital processes of the 

 corpuscle are independent of it. In saying this, 

 I am not forgetful of the work of Max Schultze 

 in 1863, quoted by Strieker ; but Dr. Beale has the 

 priority, and lays down the doctrine of the non- 

 vital character of the cell-wall in a very clear and 

 emphatic manner, classifying, as was not done 

 before, cell-walls with the inter-corpuscular sub- 

 stance. He simplified thereby the conception of 

 cell multiplication ; for if the cell-wall be, even 

 when present, no part of the vital corpuscle, there 

 is no radical distinction between fissiparous and 

 enddgenous reproduction. His distinct recognition 

 also that the origin of inter-communicating pro- 





