590 EXPERIMENT STATION EECORD. 



Our horses, their diseases and treatment, G. S. Heatley {Loudon, 1911, pp. 

 XI +186). — This is a practical guide. 



Pernicious anemia of horses, P. Schlatholteb ( tjher die pernizifjse Anamie 

 dcr Pferde. Inang. DUs., Univ. Bern, 1910, pp. 5S, i)ls. 2; ahs. in. Centbl. Bakt. 

 [etc.], 1. Abt. Ref., 1,9 {1911), No. 5, pp. 133, i3// ) .—According to the author, 

 pernicious anemia is caused by an ultrafilterable virus which is present in the 

 blood and urine of horses affected either actively or latently. If either the 

 urine or blood from infected animals is given per mouth (or on hay or straw), 

 or is injected into the blood stream of normal animals, the disease is conveyed 

 to these animals. Other domestic animals do not take the disease. The incu- 

 bation ijeriod after artificial infection is as high as 3 months. Natural infection 

 seems to have a still longer incubation period. 



No effective treatment was found, but the author advises thorough prophy- 

 laxis. 



Vaccination against equine influenza, Yaeth {Berlin. Ticrdrztl. Wchnschr., 

 26 {1910), No. 5, pp. 110, 111). — As a result of the author's work with numerous 

 cases of this disease he believes the Gans serum to possess a protective action. 



Toxic substances from Ascaris megalocephala. — Experimental investiga- 

 tions with the horse, M. Weinberg and A. Julien {Compt. Rend. Soc. Biol. 

 [Paris], 10 {1911), No. 9, pp. 337-339; abs. in Rev. Vet. [Toulouse], 36 {1911), 

 No. 5, pp. 287, 288). — In the investigations here reported 39 horses were used. 

 A clear sterile perienteric liquid obtained from A. megalocepliala was iustilled 

 into the left eye of 34 horses and injectetl into the nasal cavity of the other 5. 



The reactions obtained demonstrate that this ascarid secretes substances 

 toxic to the horse. As none of the 16 horses which reacted were carriers of 

 ascarids, and since 8 horses that were infested were found to be immune to the 

 toxic action of the instilled liquid, the authors think that the horse becomes 

 immune to the toxic substances secreted by this parasite. 



In regard to fibrolysin, Spaeth {Berlin. Tierdrztl. Wchnsclir., 27 {1911), 

 No. 9, pp. I'i8, I'lO). — Fibrolysin did not show any curative or other effect with 

 either a subcutaneous phlegmon or elephantiasis on the extremities of horses. 



Elephants and their diseases, G. H. Evans {Rangoon, 1910, pp. XIV +343, 

 pis. 28, figs. 36). — This treatise on elephants is divided into 5 parts and 9 

 appendixes. Part 1 consists of a general account; part 2 is entitled Outlines 

 of Anatomy and Physiology ; part 3, Medicines and their Administration — 

 Formulae; part 4, Noninfective Diseases; and part 5, Infective Diseases. 



The appendixes are devoted, respectively, to law cases, operations, age, 

 growth increment, list of fodder plants, grasses, etc., eaten by elephants, breed- 

 ing, case of impaction and rupture of the esophagus, surra, and a note on in- 

 fectious diseases with special reference to anthrax. 



Bacillary white diarrhea of young chicks, L. F. Rettger and F. H. Stone- 

 burn {Connecticut Storrs 8ta. Bui. 68, pp. 279-301, table 1, figs. 5). — This is a 

 report of studies conducted in 1910 in order to cori'oborate those previously 

 reported (E. S. R., 22, p. 489). The information presented includes accounts 

 of infection by the food supply, of the mother hen as the original source of 

 infection, the presence of Bacterium pullorum in the yolks of fresh eggs, 

 methods and results of testing fi'esh eggs, bacteriological examination of eggs 

 incubated for varying lengths of time, symptoms and post-mortem appearances 

 of the disease, and additional points of interest and practical suggestions. 



The following is a summary of the information presented : " The original 

 source of infection is the ovary of the mother hen. Eggs from infected hens 

 contain the organism in the yolks. Chicks produced from infected eggs have 

 the disease when hatched. The disease may be spread through the medium 

 of infected food and water, hence normal chicks may acquire it by picking up 



