226 References. 



HiLGEEMANN, R. 1906. Der Nachweis der Typhusbazillen in 

 Wasser mittels der Eisenfallungsmethoden. Archiv fiir Hygiene, 

 LIX, 355. 



Hill, C. A. See MacConkey, A. 



Hill, H. W., and Ellms, J. W. 1898. An Apparatus for the 

 Collection of Samples of Water for Chemical, Microscopical, 

 and Bacteriological Analysis. Transactions of the American 

 Public Health Association. 1897 Meeting. XXIII, 193. 



Hill, H. W. 1899. Report of Director of Bacteriological Labo- 

 ratory. Twenty-seventh Annual Report of the Health Depart- 

 ment of the City of Boston for the year 1898, 63. 



Hill, H. W. 1904. Porous Tops for Petri Dishes. Journal of 

 Medical Research, XIII, 93. 



Hiss, P. H. 1904. On the Fermentative and Agglutinative Char- 

 acters of Bacilli of the " Dysentery Group." Journal of Medical 

 Research, XIII, 1, i. 



Hofemann, W., und Picker, M. 1904. Ueber neuer Methoden 

 des Nachweises von TyphusbaciUen. Hygienische Rundschau, 

 XIV, I. 



Hoffmann, W. 1905. Untersuchungen iiber die Lebensdauer von 

 Typhusbazillen in Aquariumwasser. Archiv fur Hygiene, LII, 

 208. 



Hokrocks, W. H., 1899. On the Behavior of the Bacillus Typhosus 

 in Sewage. Journal of the Sanitary Institute, XX, 664. 



Hokrocks, W. H. 1901. An Introduction to the Bacteriological 

 Examination of Water. London, 1901. 



Horrocks, W. H. 1903. The Bacillus coli communis; considered 

 as an Indicator of Sewage Contamination of Water Supplies. 

 Journal of the Royal Army Medical Corps, I, 362. 



Horton, E. G. 1903. The Colon Bacillus in Ground Waters. 

 Journal of Hygiene, III, 155. 



Houston, A. C. 1898. Chemical and Bacteriological Examina- 

 tion of Soils with reference to the Amount and Nature of the 



