188 EXPERIMENT STATION RECORD. 



the mortality of inmuiiiizoil horses, even when inmuinized with several mono- 

 valent or polyvalent strains. It stands to reason that when we increase the 

 nnniber of injections and increase the poly valency of a virus the less the subse- 

 quent relapses will follow, but I am not prepared to say that by injecting horses 

 several times, and thereby reducing the mortality from relapses, a complete 

 immunity will be obtained sufficient to protect all injected animals. It is a 

 noteworthy feature in the immunization and in the test of horses that relapses 

 with dik-koi) may occur nu>re than once. In our experiments of 300 horses 

 injected and tested, 194 showed dik-kop once, 4G dik-kop twice, and 1 animal a 

 third dik-kop (15 ])er cent horses showing 2 dik-kops), and these dik-kops have 

 sometimes been noted within 3 weeks of each other." 



Som.e observations upon sidebone, Zimmerman {Abs. in Vet. Rcc, 22 {WO'.)), 

 No. 1113, p. 308). — The author reports upon examinations made of 1,000 horses, 

 with a view to estimating the frequence of ossification of the lateral cartilages. 



Of the 62 heavy horses examined, 44 or 70.9 per cent were affected with ossi- 

 fication, of the 900 lighter van or coach horses, 279 or 31 per cent, and of the 

 remaining 38, which were saddle horses, 10 or 26.2 per cent. All but 21 of the 

 horses examined were over 5 years of age, but in none of the younger ones with 

 1 exception could alterations indicating ossification be demonstrated. The 

 investigation confirms the fact that the fore feet are more affected than the 

 hind and the outer cartilage more often than the inner. 



Governm.ent certification of stallions, S. S. Cameron {Jour. Dcpt. Agr. Vic- 

 toria, 7 {1909), No. 7, pp. 447-Jf80, figs. 12). — This is the second annual report 

 on the veterinary examination of stallions for the government certification of 

 soundness and approval. 



Infectious diseases following' bench shows, J. M. Phillips and L. P. Garra- 

 HAN {Amcr. Vet. Rev., 35 {I'lOO), No. 3, pp. 2S0-2S5).— In the disease of dogs 

 commonly known as canine distemper, the author recognizes 2 forms, namely 

 true distemper and dog plague. The plague is thought to occur less frequently 

 than distemper, and its mortality is estimated at 30 per cent of all cases. An 

 attack apparently confers complete immunity to plague but not to distemper, 

 and a severe attack of distemper does not seem to confer any immunity to 

 plague. 



Echinorhynchus canis, B. F. Kaupp {Amcr. Vet. Rev., 35 {1909), No. 2, pp. 

 15.'f, 155, figs. 3). — Four specimens of a parasite taken from the intestines of a 

 dog are described as representing a new species {E. eanis). 



The presence of a leucocytozoon in dog's in Tonkin, C Mathis and M. Lkgeb 

 (Compt. Rend. Soc. Biol. [Paris], 67 {1909), No. 25, pp. 98-i 00). —During the 

 course of their investigations of canine piroplasmosis in Tonkin, the authors 

 have found a parasite in the leucocytes of a young dog that is apparently 

 identical with the one discovered by Bentley in India in 1905 and since studied 

 by several other workers. Only the mononuclear leucocytes were invaded by 

 this parasite. 



Tumors in the common fowl, E. E. Tyzzek and T. Ordway {Jour. Med. Re- 

 search, 21 {1909), No. 3, pp. Ji59-.'i77, pis. -'/).— Tumors are apparently of fre- 

 quent occurrence in the common fowl. Apart from certain specific peculiarities 

 these are in every way analogous to the tumors of human beings. In addition 

 to the tumors hitherto found in the hen, myxosarcoma and leiomyoma are de- 

 scribed in the present series of cases. 



A Microfilaria of the fowl, C. Matiiis and ]M. Leger (Compf. Rend. Soc. Biol. 

 [Paris], 67 {1909), No. 29, pp. 1,07-1,09, fig. i).— Under the name Microfilaria 

 seguini the authors describe a new parasite wliich occurs in fowls in Tonkin 

 associated with Filaria mansoni. 



