672 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
The work is divided into three parts, the first of which is mainly 
technical, and contains the most recent methods of study ; the second 
deals with infective diseases and the bacteria associated with them; 
while part iii. contains descriptions of about 500 bacteria. There 
is given what appears to be an excellent bibliography. It is, of course, 
impossible for us to go through the wealth of material to be found in 
the work before us ; but so much has been lately said as to the use or 
abuse of photography that it is of interest to note that Prof. Crookshank 
is convinced that “ if the employment of photography is encouraged in 
bacteriological and other research laboratories for depicting micro- 
scopical preparations and cultivation of bacteria, the results of increasing 
experience and practice all lead to its being made more general use of 
as a faithful and graphic method, valuable alike for class demonstrations 
and for illustrating publications.” 
