86 EXPERIMENT STATION RECORD. [Vol. 36 



excitement some of the symptoms were liable to recur and the ducklings 

 would be taken with spasms while swimming and drown. In examinations 

 made Wickware detected the presence in the blood of all affected cases of a 

 parasite, which gradually disappeared as recovery took place. Further studies 

 are necessary before the cause of the disease can be fully determined. See also 

 a previous note (E. S. R., 33, p. 483). 



The transmission of fllaria by Chrysops, F. K. Kleine {Zschr. Hyg. u. 

 Infektionskrank., 80 (1915), No. S, pp. 345-349). — This paper relates to studies 

 made in West Africa, where tabanids of the genus Chrysops, namely, Chrysops 

 dimidiata and C. silacea, were proved to be capable of transmitting Filaria loa. 



A new host for Fasciola mag'na, together with observations on the distri- 

 bution of F. hepatica in Canada, S. Hadwen [Jour. Amer. Vet. Med. Assoc, 

 49 {1916), No. 4, pp. 511-515, figs. 5). — The coast deei* (Odocoileus columbianus) 

 is said to be a new host for F. manna. The liver taken from a host on Texado 

 Island in the Straits of Georgia contained 18 large flukes. F. hepatica has long 

 been a source of loss of coast sheep in British Columbia but is not known to 

 occur elsewhere in Canada. 



The occurrence of the giant nematode, Dioctothyme renale (Eustrongylus) 

 in the United States and Canada, W. A. Riley {Jour. Amer. Vet. Med. Assoc, 

 49 {1916), No. 6, pp. 801-809). — Twonty-three definite cases of the occurrence of 

 the giant nematode D. renale {gigas) in the United States and Canada are 

 reported, of which 19 are here recorded for the first time. 



RURAL ENGINEERING. 



Rural engineering and the war of 1914-1916, M. Ringelmann (Ann. Sd. 

 Agron., 4. ser., 4 {1915), No. 10-12, pp. 296-381, figs. 4^).— This is an extensive 

 report on the influence of the European war on rural structures, rural hydrau- 

 lics, and agricultural machinery in France. 



Surface water supply of south Atlantic and eastern Gulf of Mexico basins, 

 1914 (U. S. Geol. Survey, Water-Supply Paper 382 {1916), pp. 66+XXX, pis. 

 2). — This rejwrt presents the results of measurements of flow made during 

 1914 on the James, Roanoke, Pedee, Savannah, Altamaha, Apalachicola, Escam- 

 bia, and Mobile rivers. 



Surface water supply of Snake River basin, 1914 {U. S. Oeol. Survey, 

 Water-supply Paper 393 {1916), pp. 248, pis. 2). — This report, prepared in co- 

 operation with the States of Idaho, Oregon, Nevada, and AVashington, presents 

 the results of measurements of flow made on the Snake River and its tribu- 

 taries during 1914. 



Well waters from farm homesteads, F. T. Shutt {Canada Expt. Farms Rpts. 

 1915, pp. 163-169). — Analy.ses of 195 samples of Canada farm water supplies 

 ere reported, showing that 49 were pure and wholesome, 54 suspicious and prob- 

 f^ibly dangerous, 36 very seriously polluted, while 56 samples were too saline for 

 potable use. 



" The cause of pollution in the larger number of instances is the access to the 

 well of drainage of an excretal character from the stable, barn, or privy. The 

 polluted wells, for the most part, are shallow, merely collectors of soakage 

 water from the surrounding soil. When these wells are, for the sake of con- 

 venience, located near the farm buildings or in the baruyai-d, as is too fre- 

 quently the case, contamination is practically inevitable. 



" The bored or drilled well, tapping a deep-seated source, is undoubtedly safer 

 ;ind more reliable than the shallow, ground-water well. Where the latter must 

 be relied on, the surroundings for a radius of. say, 50 yds. should be kept free 

 from manure and filth. Preferably this area should be sodded. As a further 



