Bacteria 



duced. If not so checked, the process would go on 

 until the substance is so transformed that it can be 

 again used by plants. So that bacteriology is a very 

 valuable science, and perhaps one that has the most 

 promise for the future of all the sciences. 



When first one sees them under a microscope, one 

 ought to be impressed by the untold possibilities for 

 good or for evil of these minute living atoms. 



An unfortunate laboratory attendant and two nurses 

 lost their lives because a few plague-bacilli escaped 

 from their glass tubes. When one sees the rows of 

 cultures in a bacteriological laboratory, one realises 

 the infinite dangers which are daily encountered by so 

 many scientists. 



1 Kienitz Gerloff. 2 Bang. 3 Ledinghen. 4 Muir and Ritchie. 



5 Molisch, Chandler. 6 Miehe. 7 Harden. 



62 



