RURAL ENGINEERING. 587 



of an irrigated plat, which amount sliould be predetermined for each plat on 

 the basis of the physical i)roperties of its soils. A greater amount than this is 

 concluded to be a waste of water and more or less of an injury to the soil. 



On the soils of varying permeabilities in-igation was found to be on the 

 average most effective and practical when ap])lie<l in preiletermined amounts 

 at intervals of seven or eight days. Very inferior results were obtained when 

 irrigation water was applied at intervals of 15 days and of three weeks. It 

 was further found that on these soils tho necessiiry total quantity of water for 

 crops computed on the basis of continual flow during the growing season varied 

 from 0.23 to 0.85 liters per second per hectare according to the physical proper- 

 ties of the soil. The commonly assumed need for all soils of a continual flow 

 of 1 liter per second per hectare is thought to be a great waste of water. 



Irrigation, R. T. Burdick (Vermont Sta. Bui. 182 (191^), pp. 840-363, pis. 

 .J).— The author discusses the general topic of irrigation and states that vege- 

 tables, small fruits, and potatoes can be best irrigated in Vermont. lie briefly 

 describes various methods of applying water, including subirrigation and 

 sprinkling. It is considered unsafe to apply more than 1 in. of water to crops 

 at a time, owing to the uncertainty regarding rainfall. Brief descriptions of 

 several irrigation plants in operation in the Eastern States are given and a list 

 of references to related literature is appended. 



Surface water supply of North Pacific coast drainage basins, 1911, F. F. 

 Henshaw et al. (U. S. Geol. Survci/, Water-Supply Paper 312 (1915), pp. 706, 

 pis. 4)- — This report presents the results of measurements of flow made on the 

 streams in the North Pacific coast drainage basin and their tributaries dur- 

 ing 1911. 



Surface water supply of the Great Basin, 1912, F. F. Henshaw, E. A. 

 PoRTEK, and G. C. Stevens (U. 8. Geol. Survey, Water-Supply Paper 330 (1914), 

 pp. 275, pis. 3). — This report, prepared in cooperation with the States of Idaho, 

 Utah, Oregon, California, and Nevada, presents the results of measurements of 

 flow made in the Great Salt Lake, Sevier Lake, Thousand Springs Creek, Salton 

 Sink, Owens Lake, ilono Lake, Walker Lake. Humboldt-Carson Sink. Pyramid 

 Lake, Winnemucca Lake, Warner Lake, Albert Lake, Silver Lake, Mauheur 

 Lake, Harney Lake, and Alvord Lake drainage basins during 1912. 



Surface water supply of lower Columbia River and Rogue, Umpqua, and 

 Siletz rivers, 1912, F. F. Henshaw and E. S. Fuller (U. S. Geol. Survey, 

 Water-Supply Paper 332-C (1914), PP- 226). — This report, prepared in coopera- 

 tion with the States of Oregon and Washington, presents measurements of flow 

 made on the lower Columbia River and the Rogue, Umpqua, and Siletz rivers 

 during 1912. 



Surface water supply of the Pacific coast in California, 1912, H. D. 

 McGlashan and G. C. Stevens (U. S. Geol. Survey, Water-Supply Paper 331 

 (1914), PP- 442, pis. 2). — This report presents the results of measurements of 

 flow made on streams in the northern and southern Pacific Ocean drain.ige 

 basins and in the San Francisco Bay drainage basin during 1912. An article 

 on Fluctuations in Ground-water Levels in the Valley of Southern California, 

 by W. C. Mendenhall, is included. 



Springs of California, G. A. Waring (C7. iS'. Geol. Survey, Water-Supply 

 Paper .338 (1915), pp. 410, pis. IS. figs. 4)- — This is a popular catalogue of the 

 spring waters of California, referring particularly to their chemical properties, 

 and including analyses. 



Profile surveys in Bear River basin, Idaho (U. S. Geol. Survey, Water- 

 Supply Paper 350 (1914), PP- 7. V^-^- (?).— This report, prepared under the direc- 

 87235°— 15 7 



