THE HUMAN AND THE POND AMOEBAE. 75 



poor Fatima had known what yon know, and had pos- 

 sessed a microscope, she might have employed herself 

 in examining the blood on the key, instead of waiting 

 in fear and trembling for the return of her wicked 

 hnsband. And perhaps even old Blue-beard himself, 

 . under her teaching, might have become a useful scien- 

 tific man. 



