AGRICULTURAL ENGINEERING. 193 



extent of tlu> rii-e interests of Louisiana and Texas. Originally diversion of water 

 from streams was depended upon exclusively for irrigation of rice fields. In time, 

 however, it was found. necessary, in order to insure a reliable supply of water in 

 time of <ln)Uglit, to (.-onstruct pumjnng plants for raising water from streams and from 

 wells. 



Irrigation studies, E. Me.vd {Trans. Amo: Soc. Civ. Eiujin., 44 {1900), Nu. S8£, 

 pp. 149- ISO, pi. 1, jiijx. 10). — An explanation of the investigations being carried on 

 by tlie author undt'r the direction of this Office, with descriptions of apparatus ajid 

 methods. 



Irrigation in Hawaii, W. M.\xwell (f7. »S'. Dept. Agr., Office of E.vperiment Sta- 

 tions Bui. 90, pp. 4^, pis. 6, figs. 3). — This bulletin discusses the climatic, soil, and other 

 conditions' as affecting irrigation in Hawaii, and gives the results of irrigation experi- 

 ments, especially with sugar cane, carried on in the islands by the author for a num- 

 ber of years. It deals with evaporation of moisture from water surfaces and soils, 

 transpiration of moisture liy vegetation, power of soils to absorb and retain moisture, 

 salts in Hawaiian soils and waters, duty of water, irrigation practice on the Hawaiian 

 Islands, and stutly of irrigation at the Hawaiian Experiment Station, including obser- 

 vations on tUstribution of water and results of overirrigation. 



Irrigation in the Hawaiian Islands {Set. Anwr., S4 {1901), No. 2, p. 20, 

 figs. S). — A brief account of a canal dug along the slopes of the great crater of Hale- 

 akala, island of ^laui, by which a stream of water flowing 50,000,000 gal. daily is 

 bro'ught 22 miles for distribution over a sugar plantation. 



Irrigation in the Philippines, G. D. Rice {Jrrlg. Age, 15 {1901), No. 6, pp. 

 186-191). — This is a brief account of oliservations on the present .status and future 

 prospects of irrigation development in these islands as ajiplied to the culture of coffee, 

 tobacco, chocolate, peanuts, oranges, lemons, and mangoes. Irrigation is now ])rac- 

 ticed to only a limited extent, but the need and opj)ortunities for its development 

 are very great. "There are very large plantations of rice, tobacco, sugar cane, choc- 

 olate, coffee, peanuts, and other products in these islands awaiting proper develop- 

 ment by irrigation. At present many of the plantations are in a state of idleness, 

 owing to the continuance of dryness, which might be overcome if the water supplies 

 of the country were properly utilized." 



Biennial report of the State Engineer of Idaho, D. W. Ross {Idalio State 

 Engiu. apt. 1899-1900, pj>. 101, ph. S, luajmS). — The subjects treated in this report 

 are the arid and irrigable portions of Idaho; increase of population and irrigation 

 since 1890; irrigation surveys; ])rojects under the Carey Act; irrigation districts; 

 duty and distribution of water, including accounts of investigations carried nn in 

 cooperation with this Otiice; water rights and their adjudication; plans for dams anil 

 embankments, and selections of desert lands by the State. 



The reservoir system of the Cache la Poudre Valley, E. S. Nettleton ( U. S. 

 Dept. Agr., Office of E.eperiineiit Statio)is Bill. 92, pp. 48, pis. 14). — This is an account 

 of the exj)erience of the Cache la Poudi-e Valley in the construction and use of stor- 

 age reservoirs. The bulletin descril)es the Cache la Poudre River and Valley, 

 reviews the history oi the settlement and development of the valley and the systems 

 (jf cropping practiced there, and gives detailed accounts of the reservoir systems 

 established by local and individual enterprise in the valley, including their location, 

 construction, tilling, and use. It is shown that by means of the water saved from 

 waste by these reservoirs and by the system of rotation in the use of water i)racticed 

 in the valley, the area ca]-)able of being irrigated has been doubled and the irrigation 

 has been more effective and thorough than is usual without the aid of storage reser- 

 voirs. The author's general conclusions are as follows: 



"(1 ) Reservoirs in the Cache la Poudre Valley are a paying investment. 



"(2) Storage of water in this valley is capable of extension. 



"(3) There is a necessity for increasing tlie carrying capacity of reserv(Mr feeders. 



