RURAL ENGINEERING. 681 



No. 4, pp. 2G1-283; abs. in Berlin Tierdrstl. Wchnschr., SO (1914), No. 81, 

 p. 555). — The authors find that this is a disease more widespread than is 

 usually supposed. In the course of two j-ears it was located in 22 establish- 

 ments, in which 100 pigs were found infected. See also a previous note (E. S. 

 R., 32, p. 378). 



The cause of pernicious anemia of the horse. — A contribution to the prob- 

 lem of the ultravisible virus, K. R. and R. Seyderiielm {Arch. Expt. Path. u. 

 Pharmakol., 76 (I'JU), No. 3-4, pp. 149-Wl, figs. 10).— After briefly reviewing 

 the literature the authors report at length upon investigations which they have 

 conducted. They find that pernicious anemia of the horse can be produced 

 artificially through the injection of aqueous extracts from the larvre of horse 

 I'otflies {Gastrophiliis equi and G. JKVtnorrhoidalis). The effect was found to 

 be due to a toxin to which they have given the name " oestrin," the toxic action 

 of which appears to be specific for the horse and donkey. The ojstrin, which is 

 }i natural excretion of Gastrophilus larvfe, is said to be absorbed through the 

 gastrointestinal canal of the horse. The toxic action of G. liccmorrhoidalis was 

 found to be very much greater than that of G. equi. Pernicious anemia can be 

 produced in the horse through the injection of blood from animals in which the 

 disease has been brought about by the extract from Gastrophilus larvre. 



A bibliography of 25 titles is included. 



Experimental investigations of the cause of pernicious anemia of the 

 horse, K. R. and R. Seyderhelm {Berlin. Tierdrztl. Wchnschr., SO {1914), No. 

 34, pp. 609-612). — A somewhat briefer report of the investigations above noted. 



Poultry diseases, E. J. Wortley {New York: Orange Judd Co., 1915, pp. 

 XI -{-123, figs. 34)- — A popular work dealing with the causes, symptoms, and 

 treatment of diseases of poultry, with notes on post-mortem examinations. 



Esperiments on cysticerci of Taenia pisiformis and of T. serialis, J. E. 

 AcKERT {Jour. Parasitology, 1 {1915), No. 3, pp. 151-153). — The author's experi- 

 ments indicate that the dog tapeworms T. pisiformis and T. serialis will not de- 

 velop in fowls. Previous investigations show that T. pisiformis fails to develop 

 in man and in swine, and that T. serialis does not develop in man, swine, cats, 

 or ferrets. 



Experimental ingestion by man of cysticerci of carnivore tapeworms, 

 M. C. Hall {Jour. Parasitology, 1 (1914), ^o. 1, pp. 42-44)- — Ingestion experi- 

 ments have led to the conclusion that records of the development of Tcvnia 

 pisiformis in men are erroneous. The other species referred to are Multiceps 

 serialis, T. tcniivformis, T. krabbei, T. tenella, T. ovis, T. hydatigena, and M. 

 multiceps. The facts presented indicate the correctness of the generally ac- 

 cepted view that adult cestodes of the genus Tsenia occurring in Garni vortie do 

 not occur in man. 



Observations on the eggs of Ascaris lumbricoides, W. D. Foster {Jour. 

 Parasitology, 1 {1914), No. 1, pp. 31-36, figs. 4). 



A peculiar morphologic development of an egg of the genus Tropidocerca 

 and its probable significance, W. D. Foster {Jour. Parasitology, 1 {1914), No. 



1, pp. 45-4T, fig- !)■ 



Rhabditin. — Contribution to a science of nematology, N. A. Cobb {Jour. 

 Parasitology, 1 (1914), No. 1, pp. 40, 41, pl- 1)- 



EURAL ENGINEERING. 



Practical talks on farm engineering, R. P. Clarkson (New York: Double- 

 day, Page & Co., 1915, pp. XV+223, pis. 17, figs. 2i).— This book, written in 

 popular form, gives simple explanations of several everyday problems in farm 

 engineering and farm mechanics for the use of the practical farmer. The fol- 



