PUBLIC HEALTH 

 CHEMISTRY AND BACTERIOLOGY. 



INTRODUCTORY. 



pUBLIC HEALTH Chemistry and Bacteriology do not 

 r -*- differ fundamentally from general chemistry and 

 bacteriology, and in fact are based on these subjects, of 

 which they are specialized departments. The same 

 principles underlie the part as the whole, and the accumu- 

 lation of scraps of knowledge derived from the parent 

 sciences, under the heading of Public Health Chemistry 

 and Bacteriology, is justifiable only on the score of con- 

 venience and the importance of economizing the student's 

 time. It is therefore necessary to remember that the 

 whole is greater than the part, and that to have wide and 

 luminous views of the subjects so designated, the study 

 of them should not be strictly utilitarian, but be extended 

 in all necessary directions as much as possible. 



A knowledge of Public Health Chemistry and Bacteri- 

 ology has become more urgently called for, owing to the 

 increase of Public Health work, to participate in which 

 it is necessary to possess a Diploma in Public Health. 



The General Medical Council at their meeting on ist 

 December, 191 1, adopted in an amended form the resolu- 

 tions and rules which form the Regulations for the Diploma 

 in Public Health. These are printed in full in an Appendix 

 to this volume. For our present purpose it is sufficient to 

 quote here Rule 2. 



Rule 2. Every Candidate for a Diploma in Sanitary Science, 

 Public Health, or State Medicine shall have produced satisfactory 

 evidence that, after obtaining a registrable qualification, which 

 should be registered before admission to examination for the 

 diploma, he has received practical instruction in a laboratory or 



