RURAL ENGTNEEKINO. 287 



Note on the role of tabanids in the transmission of trypanosomiases, E. 

 Sergent {Ann. Tntp. Med. and Par., 2 (1909), No. Ji, p. 331).— The author has 

 shown that the two species of horse flies most common in the Algerian Tell, 

 Atylotus iomenlo.sHS and A. nemoraHs, can experimentally transmit infection 

 from a diseased to a healthy animal when tlie blood sucking follows imme- 

 diately. In one experiment it was found that horse flies which had ingested 

 blood from an affected animal could infect a healthy animal 22 hours later and 

 not 48 hours later, as previously rei)orted, through a typographical error, in an 

 article prfeviously noted (E. S. R., 18, p. 285). 



Concerning' the treatment of experimental trypanosomiasis, II, B. Moore, 

 M. NiERENSTEiN, and J. L. Todd (Ann. Trap. Med. and Par., 2 (1909), No. 4< 

 pp. 265-2S8, pi. 1, fiys. 8). — This is in continuation of experiments with various 

 proposed remedies previously noted (E. S. R., 19, p. 478). 



"None of the coloring matters employed was of much value; it is suggested 

 that the active radicle in trypanocidal anilin derivatives is the ' trypanophobe ' 

 group, NHs. ... In the treatment of dogs, guinea pigs, and mice, the compara- 

 tive value of (1) acetylated atoxyl followed by bichlorid of mercury, (2) of 

 acetylated atoxyl, and (3) of atoxyl, is as the order in which they are named; 

 none of these methods is usually able to definitely cure well-established infec- 

 tions in these animals. 



" Atoxyl followed by bichlorid of mercury is found to be much superior to 

 atoxyl alone in the treatment of rabbits infected with Trypanosoma brucci; the 

 latter is nlso effective in the treatment of rabbits infected with T. gamhicnse. 

 Atoxyl and mercury combined are distinctly superior to atoxyl alone in the 

 treatment of donkeys infected with T. hrucei. but neither method is able to cure 

 a well-established infection." 



Bibliogr;iphical references are given. 



Contribution to a study of Porocephalus moniliformis, A. Broden and J. 

 RoDiiAiN (Ann. Trop. Med. and Par., 2 (1909), No. Jf, pp. 302-313).— The 

 authors have found that in nature the immature stage of this parasite infests 

 monkeys and the adult stage infests snakes. Man and various animals which 

 accidentally swallow the eggs of this parasite become intermediate hosts. 

 Snakes, particularly the larger species, if infested through swallowing inter- 

 mediate hosts become definite hosts. Bibliographical references accompany the 

 account. 



The microscopic anatomy of Trichinella spiralis, C. Frotiiingiiam, Jr., 

 (Jour. 21cd. Research, 19 (190S), No. 2, pp. 301-308. pi. 1, figs. 2).— The author 

 presents a report of studies made of the microscopic anatomy of this parasite 

 at two ages, one 3 days the other 10 days after the ingestion of infected meat. 

 Both male and female are said to be developed in 3 days. The trichinellse 

 studied were in the intestines of rats which had been fed nmscle from an 

 infected cat. 



Rubbing- post for live stock (Nci. Amer., 100 (1909), No. 13, p. 2J,8, fig. 1).— 

 An iUustration and a description are given of a rubbing post recently invented. 

 The rubbing post contains a reservoir filled with insecticide or antiseptic, and 

 may be jilaced in a suitable place convenient to the live stock. The application 

 is produced automatically by the rubbing. 



RURAL ENGINEERING. 



Irrigation in Oregon, ,7. II. T.kwis and P. A. Cupper (V. H. Dept. Agr., Office 

 Expt. Stas. Bui. 209, pp. 67, figs. 8, mai> /).— This belongs to the series of 

 reports dealing with irrigation in the arid States, previously noted (E. S. R., 

 20, p. 987). Its purpose is to furnish information regarding the present status 

 of irrigation and opportunities for settlement. 

 3406— No. 3—09 7 



