XIV INTRODUCTION 



Whilst there can be no doubt as to the advantage of a 

 wider dissemination of the ascertained facts concerning 

 bacteria, it should be borne in mind that only patient, skilled 

 observation and experimental research in well-equipped 

 laboratories can advance this branch of science, or indeed 

 train bacteriologists. The lives of Darwin and of Pasteur 

 adequately illustrate this truth. Yet it is observable that 

 States and public bodies are slow to act upon it, and fre- 

 quently in the past the most useful and substantial support 

 for the advancement of science has been forthcoming only 

 from private sources. As the world learns its intimate 

 relation to science and the interdependence between its life 

 and scientific truth, it may be expected more heartily to 

 support science. 



