PREFACE. 



These notes are intended merely as an analytical key to bacteriological 

 diagnosis, the object being to secure, as far as possible, a differentiation 

 at once rapid, accurate, and simple. The tables were originally drawn 

 up for my own assistance in differentiating the mouth and throat 

 organisms, and finding them of very material aid, the plan was extended 

 so as to embrace most of the known bacteria, and the notes are now 

 published, in the hope that they may be of service to other workers. 

 As it is not the purpose of this pamphlet to deal with matter already 

 fully treated of in text-books of Bacteriology, all details of stains and 

 such questions of technique are, with two exceptions, omitted. The 

 method of procedure has been to inoculate two tubes, one of gelatine 

 and one of agar or blood-serum, so that the special characteristics of 

 the organism at the ordinary temperature and at 37° C. might be de- 

 veloped as rapidly as possible. For the description of the organisms I 

 am indebted to the published work of Crookshank, Flugge, Schenk, 

 Sims Woodhead, and especially to that of Sternberg. My thanks are 

 also due to Dr. Dundas Grant, and to Dr. Slater, Bacteriologist to St. 

 George's Hospital, for kind advice and assistance in preparing these 

 notes for pubhcation. Space. has been left in the notes for the inser- 

 tion of new organisms as they may be discovered, or for notes as to 

 special staining methods, and the index has been arranged accordingly. 



St. GEOEGE EEID. 



