REFERENCES 



Abba, F. 1895. Sulla presenza del bacillus coli nelle acque pota- 



bili, e sopra un metodo per metterlo in evidenza. La Riforma 



medica, XI, 302. 

 Abba, F., Orlandi, E. and Rondelli, A. 1899. Ueber die Filtra- 



tionskraft des Bodens und die Fortschwemmung von Bakterien 



durch das Grundwasser. 21eitschrift fiir Hygiene, XXXI, 66. 

 Abbott, A. C. 1899. The Principles of Bacteriology. Philadelphia 



and New York, 1899. 

 Adami, J. G., and Chopin, J. A. 1904. On a Simple Method of 



Isolating from Water Forms which Agglutinate with Typhoid 



Serum. Journal of Medical Research, XI, 469. 

 Altschuler, E. 1903. Eine typhusanreicherungsmethode. Cen- 



tralblatt fur Bakteriologie, Abth. i, XXXIII, 741. 

 Amyot, J. A. 1902. Is the Colon Bacillus a Normal Inhabitant 



of the Intestines of Fishes? Transactions of the American Public 



Health Association. 1901 ileeting. XXVII, 400. 

 AxDRE\\"ES, F. W. and Horder. T. J. 1906. A study of the strepto- 

 cocci pathogenic for man. Lancet, CLXXI, 708. 

 A\'ERS, S. H. 191 1. A Counting Apparatus for Litmus Plates with a 



cold counting Plate for Use '.vith Gelatin Plates. Journal of the 



American Public Health Association, I, 892. 

 Barthel, C. Bidrag till kannedonnen om mjolksyre-bakteriemas 



forekomst och utbredunig utom mjolken. Rev. Centralblatt fiir 



Bakteriologie, Abth. II, XVT, 550. 

 Beckmann, W. 1894. Ueber die typhusahnlichen Bakterien des 



Strassburger Wasserleitungswassers. Archiv fiir exjjerimentelle 



Pathologic und Pharmakologie, XXXIII, 466. 

 Belitzer. 1899. Zur Lehre iiber das Bacterium coli commune. 



Rev. Jahresbericht iiber die Fortschritte in der Lchre von den 



pathogenen Mikroorganismen, XV, 326. 

 Bergey, D. H., and Deehax, S. J. 1908. The colon-aerogenes group 



of bacteria. Journal of Medical Research, XIX, 175. 



281 



