6 BACTERIA IN DAILY LIFE 



serials devoted to the publication of bacterial 

 and allied researches as the Annales de VInstitut 

 Pasteur, the Centralblatt fur Bakteriologie, the 

 Zeitschrift fur Hygiene, the Annali d'Igiene 

 Sperimentale, and other well - known journals 

 which constitute an essential but ever-increasing 

 burden upon the library shelves as well as pocket 

 of the investigator. 



Museums of bacteria have been established 

 where not only specimens of particular varieties 

 of a permanent character for comparison and 

 reference can be obtained, but living cultivations 

 of hundreds of different micro-organisms are 

 maintained ; and only those who have had the 

 charge of bacteria can realise the enormous 

 amount of skilled labour involved in the catering 

 for such a multitude, in which individual likes 

 and dislikes in regard to diet and treatment must, 

 if success is to be secured, be as carefully con- 

 sidered as is necessary in the case of the most 

 delicate and highly pampered patient. 



Bacteria, by means of these dep6ts, can, in fact, 

 be bought or exchanged by collectors with as 

 much facility as postage stamps, with the all- 

 important difference that this collecting of bacteria 

 is not a mere mania or speculation, but serves a 

 most useful purpose. 



To the busy investigator who cannot afford 



