682 EXPERIMENT STATION RECORD. 



although in advanced cases accompanied by edema this drug does not give good 

 results. In acute cases at least one dose a week of from 10 to 20 cc. should 

 be given. 



" Black tongue " or tjrphus of dogs, J. M. Keer {Vet. Alumni Quart. [Ohio 

 fitate Vnir.'\, 2 (1915), Ko. 4, pp. loJf, 155). — The author calls attention to the 

 fact that this disease of dogs, known to be extremely common in the Southern 

 States and as far north as Virginia, resembles the disease described by Hutyra 

 and Marek as typhus (E. S. R., 26, p. 82). 



Complement fixation in intestinal parasitism, of dogs, .1. A. Kolmer, Mary 

 E. Teist, and G. D. Heist {Jour. Infect. Diseases, IS {1916), Ko. 1, pp. 88-~ 

 105). — From the results of a study of complement fixation tests with the sera 

 of infested dogs the authors believe that the production of antibodies may occur 

 after infestation of the intestines with the common parasites. 



" Production of antibodies was especially in evidence in infestations with 

 tapeworms, to a less degree with the ascarids or round worms, and to a slight 

 extent with the whip-worm. These complement fixations have tended to show 

 a biologic relation between the tapeworms Tania serrata and DipyVnUuin 

 caninum and between Ascaris cnnis and Strongylus gipus, although on account 

 of the wide morphologic differences we leave it an open question. It is prob- 

 able, therefore, tliat complement-fixation tests will not differentiate, with the 

 usual teclinique, lietween related species of parasite.s, although they may show 

 the presence of a parasite. 



"Complement-fixation tests may be of value in the diagnosis of intestinal 

 parasitism of man, and we are now making investigations in this field." 



Some experiments with agents calculated to kill the Trombidium holo- 

 sericeum, B. F. Kaupp (.SVicHrr, n. scr., JfS {1916), Ao. 1097, pp. ,i,i^5). — Tests 

 made of the effect of a number of parasiticides uiion the chicken mite have letl 

 to the conclusion that in order to destroy this mite effectively they must either 

 be in solution or be capable of giving off volatile substances which in themselves 

 are destructive. 



RURAL ENGINEERING. 



Some notable irrigation and hydro-electric developments, C. E. Grunsky 

 (In Xntitrc ami Scioitr on the Pacific Const. San Franci.'ico: Paul FAdrr rf Co., 

 1915, pp. 22S-2S6). — This article descril)es briefly some of the more important 

 Government and private irrigation and hydro-electric developments in Cali- 

 fornia and gives a bibliography of related works. 



State rivers and water supply commission, tenth annual report, 1914r-15 

 {Victoria Rivers and Water Suiii/lif Com. Ann. Rpt., 10 {191Jf-15), pp. Jfl, figs. 

 2). — Tlie physical and financial conditions of water supply and irrigation works 

 in Victoria for the financial year 1914-15 are report(^l. 



The Dethridge meter. V. M. Cone {Colorado Sta. Bui. 215 {1915), pp. 11, 

 figs. 7). — The results of experiments on 4-ft., .'-ft., and G-ft. Detliridge meters, 

 conducted under a cooperative agreement between the Office of Public Roads 

 and Rural Engineering of this Department and the Colorado Experiment 

 Station, are graphically reported, the curves showing the approximate loss of 

 head necessary to allow different quantities of water to flow through the meter, 

 the quantities of water passing through the meter with the wheel revolving at 

 different speeds, and the acre-inches of water delivered per revolution of the 

 wheel with different depths of water in the ditch. 



The construction and operation of the meter are described and diagram- 

 matically illustrated. A previous report dealing in part with the Dethridge 

 meter has been noted (E. S. R.. 32, p. 683). 



