1917] RURAL ENGINEERING. 183 



"Convalescent, symptoniatically treated horses should not be permitted to 

 come in contact with healthy ones until four weeks after the fever has sub- 

 sided. However, animals in which the fever subsides in 36 to 48 hours after 

 treatment with neosalvarsan may be released eight days after its drop to 

 normal." 



In most cases the author found a single infusion of 4.5 gm. of neosalvarsan to 

 reduce the fever to normal within 24 to 36 hours. 



A tri-radiate tapeworm (Anoplocephala perfoliata) from the horse, F. J. 

 Meggitt (P(irasitolo<ju, 8 {1916), No. 4, pp. 379-3S9, pi. 1, figs. 2). — A report of 

 anatomical studies made of a tri-radiate form of tapeworm taken from a horse 

 which had died from the cumulative effects of numerous parasites. 



Diseases of the dog and their treatment, G. Mulleb and A. Glass {Chicago: 

 Alexander Eger, 1916, 4- c(i-> '"<?«'• «''<i cnL, pp. 506, pis. 11, figs. 178; rev. in 

 Jour. Anier. Vet. Med. Assoc., 49 {1916), No. 6, p. 881). — A fourth revised and 

 enlarged edition of the work previously noted (E. S. R., 21, p. 684). 



Parasitological investigations {Kansas Sta. Rpt. 1915, p. 20). — Investiga- 

 tions have confirmed the report previously noted (E. S. R., 30, p. 485) that the 

 fowl nematode {Heterakis perspicillum) may be transmitted by the dung earth- 

 worm (Helodrilus parvis), but indicate that the transmission is due to associ- 

 ation rather than parasitism. It was found that cottontails and jack rabbits 

 infested with tapeworm cysts may be fed to fowls without danger of transmit- 

 ting the tapeworms. 



RURAL ENGINEERING. 



Annual report of the state engineer and surveyor of the State of New York, 

 1914 (Ann. Hpt. State Engin. and Surveyor N. Y., 1914, PP- 448, pis. 64). — This 

 reports tlie activities and expenditures of the office of the New York State engi- 

 neer and surveyor for the fiscal year ended September 30, 1914. 



The action, of copper sulphate on the algae in drinking water, A. A. Bado 

 {La Accion del Sulfato dc Cobre sohrc las Algas de las Aguas Potables. Buenos 

 Aires: Govt., 1916, pp. 15, pis. 4)- — Experiments on the treatment of La Plata 

 River water with copper sulphate to destroy algfe are reported. 



It was found that for that water the optimum amount of copper sulphate for 

 algfB destruction is 2 parts per million, used at intervals of from five to ten 

 days. It was further found that the coli bacteria were not entirely removed 

 from the water by such treatment. 



Chlcrin treatment of water, K. Hilscher {Cal. Bd. Health Mo. Bui., 12 

 {1916), No. 2, pp. 84-86, fig. 1; West. Engin., 7 (1916), No. 10, pp. 382, 383, f.g. 

 1). — A simple hypochlorite plant for treating water is illustrated and described, 

 and the hypochlorite treatment is briefly compared with the liquid chlorin treat- 

 ment. 



Successful sewage disposal by broad irrigation, T. Bartlett {Engin. Neivs, 

 76 {1916), No. 13, pp. 586, 587, figs. 5).— Tliis article states that an average 

 daily flow of sewage of about 13,500,000 gal. from San Antonio, Texas, is deliv- 

 ered to an irrigation company through the agency of which some 1,600 acres of 

 private land are irrigated. A natural lake enlarged for the purpose is used to 

 store the sewage when not needed for irrigation. 



"The present annual quantity of sewage received from the city's trunk out- 

 let is roughly estimated at 15,000 acre-feet. Of this some 8.000 acre-feet are 

 applied to the lands by broad irrigation at an estimated average daily rate of 

 10,000 gal. per acre during the season. The remainder is impounded in the 

 lake, together with from 400 to 800 acre-feet of storm water. From a small 

 marshy flat the lake has beeu extended by successive increases in the height of 



