OFFICE OF EXPERIMENT STATIONS. 229 



found necessary to devise special apparatus for securing samples, and 

 this has been done under the direction of the expert in charge. 

 The important influence of sediment is shown in the fact that as high 

 as '34 per cent of solid matter was contained in some of the samples 

 taken. The effects of this on the continuous operation of canals or 

 on the enduring value of storage basins are so marked as to warrant 

 the continuance of these studies, which has been arranged for. 



IRRIGATION PUBLICATIONS. 



Six technical bulletins, one Farmers' Bulletin, a Yearbook article, 

 and a circular on irrigation, aggregating over 1,500 printed pages, 

 have been prepared for publication during the year. 



The Use of Water in Irrigation. Report of Investigations made in 

 1899, under the supervision of Elwood Mead, expert in charge, and 

 C. T. Johnston, assistant, including reports by special agents and 

 observers W. M. Reed, W. H. Code, W. Irving, O. V. P. Stout, Thomas 

 Berry, S. Fortier, R. C. Gemmell, G. L. Swendsen, and D. W. Ross 

 (Bulletin No. 86, pp. 253, pis. 50, figs. 18). This bulletin explains the 

 methods in use in the arid States in the distribution and use of water 

 in irrigation. It gives a large number of measurements made to 

 determine the duty of water and the losses by seepage and evap- 

 oration from canals, and discusses the* methods by which the water 

 supply may be more effectively and economically utilized in the pro- 

 duction of crops. 



Irrigation in New Jersey, by Edward B. Voorhees, director, New 

 Jersey Agricultural Experiment Stations and professor of agriculture, 

 Rutgers College (Bulletin No. 87, pp. 40, figs. 5), gives the results of a 

 number of experiments on different kinds of small fruits, melons, and 

 vegetables during 1898 and 1899, made for the purpose of determining 

 whether irrigation during short periods of drought in regions where 

 the rainfall is usually sufficient for the maximum growth of crops will 

 sufficiently increase the yield to pay for the works necessary to obtain 

 the supply of water, and reports observations on the construction and 

 cost of six small irrigation plants in New Jersey. 



Irrigation in Hawaii, by Walter Maxwell, director and chief chemist, 

 Hawaiian Experiment Station (Bulletin No. 90, pp. 48, pis. 6, figs. 3), 

 discusses the climatic soil and other conditions as affecting irrigation 

 in Hawaii, and gives the results of irrigation experiments, especially 

 with sugar cane, carried on by the author for a number of years. 



The Reservoir System of the Cache la Poudre Valley, by E. S. 

 Nettleton (Bulletin No. 92, pp. 48, pis. 14), contains a description of 

 the reservoir system of the Cache la Poudre Valley, showing the 

 benefits to be derived from the construction of reservoirs for the stor- 

 age of water for irrigation. 



Irrigation Laws of the Northwest Territories of Canada and Wyo- 

 ming, with discussions by J. S. Dennis, deputy commissioner of public 

 works, Canada, and Fred Bond, State engineer of Wyoming, and 

 J. M. Wilson, agent and expert, irrigation investigations, Office of 

 Experiment Stations (Bulletin No. 96, pp. 90, pis. 5), includes texts of 

 the irrigation laws of the northwest territories of Canada and of Wyo- 

 ming, with the regulations, forms, and methods of procedure adopted 

 in the administration of these laws, and discussion of the principles 

 underlying the laws and the methods followed in their enforcement. 



Irrigation Investigations in California, by Elwood Mead and others 

 (Senate Doc. No. 108, Fifty-sixth Congress, 2d session, pp. 73). This 



