AGEICULTURAL ENGINEERING. 195 



zoological division of the Bureau. It is arranged alphabetically according to authors 

 and includes all authors' names beginning with A. The subjects covered by the 

 catalogue are along the lines of medical and veterinary zoology. The hope is 

 expressed that subsequently a subject catalogue of this material may be published. 



AGRICULTURAL ENGINEERING. 



The engineering of agriculture, O. V. P. Stout {Agricidture [ A>/»v(,sA'o] , 190^, 

 Jhiw, pp. 5-10). — This article discusses briefly the need and opportunities for inves- 

 tigation along the following lines: Irrigation and drainage; road making; water sup- 

 ply and sewerage engineering; landscape gardening; the use of steam, electric, w'ater, 

 and wind power; construction of farm buildings, bridges, etc.; heating, ventilation, 

 and refrigeration; prevention of erosion; the mechanical principles of draft; and 

 machine construction. 



Irrigation at the station farm, 1898-1901, A. J. McClatchie {Arizona St a. 

 Bui. 41, VP- 4S,figi>. 4)- — This bulletin discusses the avaiial)le water supply, soil of 

 the station farm, season of growth, rainfall during the years covered by the experi- 

 ments, temperature and relative humidity, evaporation, method of measuring water, 

 the iniportance of using water economically, the amounts of water applied during 

 different years, and the methods used in irrigating alfalfa, beets, cabbages, corn, cow- 

 peas, grain, grapes, melons, onions, orchards, peas, potatoes, pumpkins and sciuashes, 

 sorghum, strawberries, tomatoes, and small garden vegetables. The water supply 

 of this region (the Salt River) is irregular, being smallest in summer when most 

 needed, thus emphasizing the need of storage reservoirs to equalize the flow. 

 "Without storage reservoirs, the most rational procedure is to store in the soil dur- 

 ing the periods of heavy river flow, as much water as practicable, and to irrigate all 

 crops in the most economical manner during periods of scarcity." 



The average rainfall is about 7 in., but was below the average for the period cov- 

 ered by the experiments here reported. "With the exception of a few of the rains 

 of winter, local rains are seldom of direct beneflt to crops, and in many cases are a 

 decided injury. . . . The mean annual temperature at the farm has been 68 to 69° 

 F. , during the past 4 years, and the mean relative humidity 33 to 37. The total 

 evaporation from a water surface for the one year during which a record has been 

 kept was 65.6 in., evaporation being most rapid during July, and slowest during 

 December and January. . . . The total amount [of water] used upon the station 

 farm during 1901 wa'* aj^proximately 6 acre-feet per acre, more than necessary being 

 applied during winter, and the available supply during summer being inadequate. 

 Of the crops of which a record was kept during 1900, barley received the smallest 

 amount of water, and onions the greatest. Of the crops grown during 1901, potatoes 

 received the smallest amount of water, and strawberries the greatest. . . . Orchards 

 and vineyards need irrigation throughout the summer, when young; but when 

 established, most of the water needed by them may be applied during winter." 



Irrigation in the East {Forestry and Irrig., 8 {1902), No. 7, pp. 298-300).— k. 

 f>rief summary of statistics from the Twelfth Census showing the extent of irrigation 

 in Maine, ilassachusetts, Connecticut, Rhode Island, New Jersey, New York, and 

 Pennsylvania. 



Irrigation and rice growing in Louisiana {Foresirij and Irrig., 8 {1902), No. 9, 

 pp. 366-370, fign. 2). — A brief account of the recent rapid growth of the rice industry 

 in Louisiana, due mainly to the introduction of improved methods of irrigation. 



The distribution of water. Powers and. duties of irrigation oflS.cials in 

 Colorado, H. N. Haynes {Colorado Sta. Bid. 67, pp. 31). — This bulletin consists of 

 two lectures delivered before the short course for irrigation offlcials at the Colorado 

 Agricultural College in the spring of 1901, which give a summary of useful informa- 

 tion on this subject. 



