48 



REFERENCES. 



(1) Skschivan (Centralblatt fur Bacter., etc., 1903, Vol. XXXIII, No. 4, p. 260). 



(2) Kister & Schumacher (Zeit. fur Hyg. u. inf. Krank., Vol. LI, 1905). 



(3) Indian Plague Commission (Journal of Hygiene, 1907, Vol. VII, No. 3). 



(4) White (Medical Record, vol. 67, No. 4, Jan. 28, 1905). 



(5) Kitasato (Philippine Journal of Science, Vol. I, No. 5, 1906). 



(6) Wherry, Walker & Howell (Journal Am. Med. Assn., April 11, 1908, Vol. L, No. 15). 



(7) Pound (1907, Report on Plague in Queensland, B. B. Ham, p. 134). 



(8) Dunbar & Kister (1904, Centralblatt fiir Bact., etc., Vol. XXXVI, No. 1, p. 127). 



(9) Kolle & Martini (Deut. Med. Woch., Jan. 2, 1902, Vol. XXVIII). 



(10) Kister (Centralblatt fiir Bact., etc., July 24, 1906, Vol. XLI, No. 7). 



(11) Neumans (1903, Zeit. f. Hyg. u. inf. Krank., Vol. XLV, No. 3, p. 451). 



(12) Kister & Schmidt (1904, Centralblatt fiir Bact., etc., Vol. XXXVI, No. 3, p. 454). 



(13) Aujeszky (1904, Centralblatt fiir Bact., etc., Vol. XXXVI, No. 5, p. 603). 



(14) Ledingham (Journal of Hygiene, 1907, Vol. VII, No. 3). 



(15) Baxter-Tyrie (Journ. of Hygiene, Vol. V, 1905, p. 315). 



(16) Wherry (The Journal of Infect. Diseases, Dec. 18, 1908, Vol. V, No. 5). 



(17) Klein (The Bacteriology and Etiology of Oriental Plague, MacMillan and Co., 



London, 1906). 



(18) Indian Plague Commission (Journal of Hygiene, 1907, Vol. VII, No. 6, p. 761). 



(19) Indian Plague Commission (Journal of Hygiene, 1906, Vol. VI, No. 4). 



RAT RECORD CARD. 



[Legend: O= Ordinary; W= White belly; R=Red; Go.= Gopher rat; S= Small; M= Medium; L= Large; 

 M. R.=Musrattus; M. N.=Mus norvegicus.] 



a Number of foetuses. 

 PLAGUE RAT CARD. 



PLAGUE RAT NO. 50. 

 Date: June 20, 1908. 

 Species: M. norvegicus. 



From District No. 6, sewer, Haight and Steiner Streets. 

 Condition: Badly injured by trap; thorax crushed. 

 Subcutaneous injection: General, marked. 



Lymphatic glands, bubo or other lesions: Eight inguinal bubo, caseous. 

 Liver: Typical whitish granules. 

 Spleen: Large, dark, firm. 

 Pleural effusion: Unable to say. 

 Purulent or caseous foci: 

 Diagnosis from gross lesions: Plague. 

 Diagnosis from smears: Plague (spleen and bubo). 

 Cultures: B. pestis recovered from liver culture. 

 Inoculation, guinea pig No. 50 A, +6.25.08. 

 Vaccination, guinea pig No. 50 B, +6.26.08. 

 Date suspicious: 

 Date positive: June 20, 1908, 

 Date negative; 



