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. * Muir and Ritchie. 
5 Molisch, Chandler, ® Miehe. 7 Harden, 
62 
