ioo4 



Ropy Milk. 



[march, 



guishing between members of this group by the appearance of colonies 

 on gelatine (third place of decimals). Descriptions of the growth on 

 various media are given in most of the original papers, and in some 

 of the text-books mentioned, and, better still, pure cultures of many 

 of the organisms can be obtained for comparison in this respect. 



As regards gas production (fourth place of decimals) the strongly 

 aerobic nature of the organisms of Group I. makes it difficult to 

 obtain growth in a closed tube, but in some cases considerable quan- 

 tities of gas are produced. 



The permanence of ropiness (fifth place of decimals) must neces- 

 sarily be studied in pure cultures. If other organisms are present 

 variable results may be obtained. 



The time taken to make milk ropy (sixth place of decimals) is a 

 factor of the greatest importance from a practical point of view. The 

 writer has excluded all those organisms from the list which take longer 

 than three days to produce this condition, as these would be of no 

 practical importance to the milk vendor. 



The staining quality of these organisms does not offer a good 

 means of differentiation, as they all stain fairly well by ordinary 

 methods. 



Appendix B. 



Author. 

 Adametz, L. ... 



Bavthel, Chr. 

 Beijerinck, M. W. 

 Burri, R 



Conn, H. W. 

 Duclaux, E. 



Flugge 



Freudenreich, E. von ... 



Gabbi 



Gruber, Th 



Guillebeau, A 



Harrison, F. C, and 

 Barlow, B. 



Hohl, J 



Hueppe, F 



Laer, van 



Lafar, F. ... . 



Lister .. 



Loeffler, F 



Migula 



5 5 



Olsen-Sopp, O. J. 



References. 



Publication. 



landw. Jahrb., Vol. XX., 1891, pp. 185-206 

 Centralbl. /. Bakt. II, Vol. VI., 1900, 

 p. 406. 



Centralbl. f. Bakt., Bd. 28, 1910, pp. 614-617 



Bot. Ztg., Bd. 49, 1 89 1, p. 704 



Schweizer landw. Centralbl., 1 903. 

 Centralbl. / Bakt. II, Vol. XII, p. 192 ... 



p- 371 



Classification of Dairy Bacteria. Report 



Storr's Ag. Expt. Station, 1899. 

 Ann. dePInst. Agron., T. VIII., 1882 

 Traite de microbiologic, 1 883 . . . 



Principes de laiterie, 1893 



Mikroorganismen, 1896, p. 198 



P- 359 



Ann. de microgr., Vol. II., 1889, p. 353 

 Centralbl./. Bakt., Vol. V., p. 505 ... ... 



Centralbl./. Bakt. II, Vol. IX., 1902, p. 785 

 landw. Jahr. der Schweiz, Vol. V., 1891, 

 P- 135- 



Centra/bl. /. Bakt. I/., Vol. XV., 1905, 

 P- 517. 



Centralbl./. Bakt. II, Vol. IX. p. 338 ... 

 Mitt. Kais. Ges.-Amt., Vol. II., 1884, p. 309 

 Dtsch. mediz. Wochenschr., Vol. X., 1884, 

 P- 777- 



Centralbl. f. Bakt., Vol. IX., 1891, p. 700. 

 Handb. der Tech. Mykol., No. XII., 1 906, 

 p. 199. 



Quarterly Journal of Microscopical Science, 



1878, p. 391. 

 Berl. klin. Wochenschr., Vol. XXIV., 1887, 



p. 607. 



System der Bakt., Vol. II., p. 689. 



P- 119 



Centralbl./. Bakt. II, Vol. XXXIII., 1912, 



PP- 1-54- 



3) 



Reference 

 (I) 



(6) 



(5) 

 (25) 

 (19) 

 (19) 

 (19) 



(6) 



(3) (12) 

 (13) 

 (12 & 



(15) 



(20b) 

 (21) 

 (26) 

 (IO) 



(7) 



(27) 



(9) 

 (14) 

 (14) 



(11) 



(29) 



(2) 

 (20a) 



(17) 

 (3i) 



