1919] VETERINARY MEDICINE. 781 



one cow serves to indicate quite definitely tlie presence of infection in the 

 herd. To determine more accurately the character of the infection in any 

 individual cow there is needed, in addition to the quantitative agglutination 

 test, a bacteriological study of the milk and of any prematurely discharged 

 calf or fetus." 



A comparative study of Leishmania infantum of infantile kala azar and 

 Leptomonas (Herpetomonas) ctenocephali parasitic in the gut of the dog 

 flea. E. E. Tyzzer and E. L. Walker {Jour. Med. Research, JfO {1919), No. 2, 

 pp. 129-176, pis. 3, figs. 3). — This is a report of an investigation which was lim- 

 ited to the study of the flagellate of the dog Ilea {CtenocepJialus canis) of 

 the United States and the parasite of human kala azar of the Mediterranean 

 region (L. infantum). The authors prefer to consider the leptomonads as 

 constituting one or more genera comprised of many distinct species rather 

 than collectively as races or varieties of a single species. 



A list of 49 references to the literature is included. 



Necrobacillosis. G. B. Morse {Ainer. Jour. Yet. Med., 14 (1919), No. 9, pp. 

 457-46O).— An address delivered at Omaha in July. 1919. 



The effect of potassium iodid on experimental sporotrichosis, D. J. Davis 

 (Jour. Infect. Diseases, 25 {1919), No. 2, pp. 124-131). — "Experimental sporo- 

 trichosis in rats responds promptly to potassium iodid. The lesions in tho 

 peritoneal cavity become firm, hard, and small, and are surrounded by a dense 

 fibrous capsule ; within the nodules living sporotricha are found for a long 

 time (at least four months). Potassium iodid will not prevent experimental 

 sporotrichosis, but will cure it. 



" It is suggested that sporotrichosis, so readily produced experimentally, fur- 

 nishes a good opportunity for the study of the behavior and reactions of iodin 

 and iodids in chronic infections." 



A comparison of the life cycle of Crithidia with that of Trypanosoma in 

 the invertebrate host, I. McCulix)CH {Univ. Cat. Pubs. Zool., 19 {1919), No. 4, 

 pp. 135-190, pis. 5, figs. S). — This report of investigations conducted includes a 

 bibliography of 20 titles. 



Tuberculin tests, C. C. Walker {Jour. Atner. Vet. Med. Assoc, 56 {1919), No. 

 1, pp. 5-1 Jj). — The author discusses the value of the subcutaneous, intradermal, 

 and ophthalmic tuberculin tests in tuberculosis eradication work, with illustra- 

 tions from actual practice in 11 herds in Montana. In some of these herds the 

 intradermal test proved more efficient than the subcutaneous, and in others the 

 value of the two tests appeared to be about equal. The ophthalnnc test is con- 

 sidered valuable in checking the findings of the other two tests. 



New and nonofficial remedies, 1919 {Chicago: Amer. Med. Assoc, 1919, pp. 

 388+XXIX). — The 1919 edition of this book contains certain revisions and 

 additions to the 1918 edition previously noted (E. S. R., 40, p. 284), while 

 other articles, a list of which is given in the preface, have been omitted. "At- 

 tentioji is called to the revision of the article on digestive ferments; to the 

 description of chlorinated eucalyptol ; to the replacement of the monograph for 

 neutral solution of chlorinated soda by one for surgical solution of chlorinated 

 soda; to the discussion of sulphoichthyolate preparations; to the revision of 

 the general and the special discussions of serums and vaccines; and to the 

 article (m silver preparations." 



Note on the Hygienic Laboratory method of standardizing- disinfectants 

 (Pub. Health Rpts. [U. S.], 34 {1919), No. 42, pp. 2297, 229S).—A modification 

 of the Hygienic Laboratory method of preparing beef extract medium for use 

 in the standardization of disinfectants is described as follows: 



A 500-gin. portion of finely chopped round steak is placed in 1,000 cc. of tap 

 water and allowed to stand in a cool place for 24 hours, and is then strained 



