METHODS OF RESEARCH: REFERENCE BOOKS 77 



PARK, WILLIAMS and KRUMWIEDE: Pathogenic Micro- 

 organisms. A practical manual for students, physicians and 

 health officers. 6th ed. Lea and Febiger, New York and 

 Philadelphia, 1917. 



KENDALL: Bacteriology. General, Pathological and In- 

 testinal. Lea and Febiger, Philadelphia and New York. 



Microbiology: A text-book of microorganisms general and 

 applied. By Charles E. Marshall and many others. Second 

 edition revised and enlarged with 186 illustrations. Published 

 by P. Blakiston's Son & Co., Philadelphia, 1917. 



Laboratory Methods of the United States Army. Compiled 

 by the Division of Infectious Diseases and Laboratories, Office 

 of the Surgeon-General, War Department, Washington, D. C. 

 Medical War Manual No. 6, pp. 256. Lea and Febiger, Philadel- 

 phia and New York. A marvel of compactness and accuracy. 

 It weighs only 4 ounces and is a veritable Vade-mecum. 



RIDGWAY, ROBERT: Color Standards and Color Nomen- 

 clature. Washington, D. C., 1912. Published by the author. 

 I have referred to this book as "R 2 " and to its predecessor, 

 "A Nomenclature of Colors for Naturalists" (Little, Brown and 

 Co., Boston, 1886), as "R^" 



APPARATUS 



Only some hints which may prove useful are here included. 



1. For Preparation of Culture Media 



Culture media can be made, in default of better appliances, 

 with some neutral litmus paper, a glass graduate, a pair of scales, 

 some cork-stoppered flasks or bottles, a pen-knife, a kitchen 

 stove and a tea-kettle, but certain other and more convenient 

 kinds of apparatus are desirable. I shall mention only some of 

 the leading articles. 



Receptacles. Test tubes, beakers, pipettes, graduates, 

 Erlenmeyer flasks, and Petri dishes are the most commonly used 

 glassware. Resistant (insoluble) Jena glass or its equivalent, 

 American Pyrex glass, is always desirable and is absolutely 

 necessary for some purposes. 



