VETERINARY MEDICINE. 881 



duced or eliminated. When pigs are inoculated witli increasing amounts of 

 serum and virus, a point is readied at which the pigs no longer show more than 

 a transient fever. This disease is regarded as the protective dose of the serum. 



Desiccation appeared to have no effect upon the potency of the serum. When 

 the red blood cells were removed from a serum It was definitely more potent 

 than the serum containing the cells. Seinim stored in aluminum vessels for 24 

 hours was not necessarily affected in ])otency. 



A contribution to the shoat typhoid (Ferkeltyphus) problem, H. Weidlioh 

 (Amer. Jour. Vet. Med., 9 (1914), A^OS/ 10, pp. 728-730, 761, 762; 11, pp. 796- 

 798, 837, 838; 12, pp. 870, 871).— A translation from the German of the article 

 previou.sly noted (E. S. R., 32, p. 83). 



The present state of knowledg-e of swine fever with special reference to 

 the available statistics, M. Gheenwood, Jr. (Lister Itist. Prev. Med., Collected 

 Papers, No. 10, pt. 1 (l<)13-lJf), Paper 12, pp. 60+111).— A statistical study 

 made at the request of the National Pig Breeders' Association to determine the 

 present state of our knowledge regarding the pathological and administrative 

 procedure relative to swine fever, with special reference to the serum treat- 

 ment In England and abroad. " The report is divided into the following sec- 

 tions : The pathology and bacteriology of swine fever and swine plague ; the his- 

 tory of swine fever and swine plague; the statistical history of swine fever in 

 Great Britain; the statistical history of swine fever and swine plague on the 

 Continent; the experimental basis of immunization; the statistical evidence 

 relating to immunization. Certain statistical data on American field experi- 

 ments are analyzed in an appendix." The principal conclusions drawn are the 

 following : 



" There is strong experimental evidence that both serum and simultaneous 

 (serum and virus) inoculations enable treated animals to withstand infective 

 conditions which prove fatal to the large majority of untreated animals. The 

 duration of this power to withstand fatal infection lasts much longer in animals 

 treated by the simultaneous method. There is prima facie evidence that the 

 same conclusions hold in field practice. The statistics upon which the third 

 conclusion rests are incomplete in various ways, and deductions made from 

 them are subject to suspicion owing to possible fallacies or errors. There is 

 no reliable evidence for or against the view that simultaneous inoculation, prop- 

 erly carried out, is liable to convey infection to healthy pigs. Dorset and his 

 colleagues' original experiments suggest that this danger depends upon the suc- 

 cess with which the dose of serum counterbalances the dose of virus, and that 

 a vaccinated animal without symptoms of illness is no danger to others." 



Sacks as carriers of swine fever, J. F. D. Txttt (Vet. Jour., 70 (1914), ^o. 

 472, pp. 513, 514). — "The writer believes that the fact that sacks are fertile 

 agents of propagation of the infection has long been recognized by the general 

 practitioner, who has unfortunately only too small a share in the control of the 

 disease." 



Report on the results obtained by the special committee for investigation 

 of infectious anemia of the horse (Vet. Jour., 70 (1914), No. 474, pp. 604-627, 

 figs. 2). — This is the report of a special committee organized by the Japanese 

 Government in July, 1909, for the investigation of infectious anemia of the 

 hor.se. The appointment was brought about through outbreaks of the disease in 

 several important breeding districts in Hokkaido and in the northeastern part 

 of Hondo, the main island of Japan. The investigation was continued up to 

 March, 1914, during which time more than 1,000 animals, including 980 horses, 

 1 donkey, 7 calves, 5 goats, 6 sheep, 7 pigs, and a few other small animals were 

 experimented witli. 



