696 EXPERIMENT STATION RECORD. 



at the time when water for irrigation is most needed. The largest 

 amount pumped occurred during the 10 days from February 13 to 23, 

 and was enough to cover 75.73 acres 1 in. deep." 



"The mean amount of water pumped during the 100 days from May 29 to Sept. 6 

 was 24.549 aere-inches per 10 days, and as this is the season when the water is most 

 needed in the United States it shows about what the capacity of such a plant is for 

 irrigating purposes where the lift is 10 ft. With a lift of 20 ft. the capacity would he 

 a little less than one-half of this amount. That is to say 10 in. of water can he given 

 to 24.5 acres of ground during 100 days where the lift is 10 ft. and 12.25 acres where 

 the lift is 20 ft. ; and 20 in. of water could he given to one-half of these areas, 

 respectively. There were, during the year, 5,239 hours when the velocity of the wind 

 equaled or exceeded a meau of 9 miles per hour and there were 3,531 hours when the 

 mean velocity did not reach 9 miles per hour, during which time there was no water 

 pumped or but very little, because the wind was too light.'' 



The mill worked on an average 14.32 hours per day during the whole 

 year and 10.74 hours per day during the period from March 6 to Sep- 

 tember 1 (the irrigation season). 



The horsepower of the mill was calculated from the amount of water 

 pumped and determined by brake tests. The effective horsepower 

 measured by the water lifted during the year (305 days of 24 hours 

 each) was .1817. Figured on the basis of 14.32 hours per day, the 

 effective horsepower was .3044. 



"In the last trials [with brakes] the indicated horsepower was . . . 3.932 times the 

 effective horsepower, and did this ratio hold true for all of the pumping the actual 

 horsepower developed by the windmill would be .3044 x 3.932 = 1.197 horsepower, 

 while the curve of brake tests gave 2.107 horsepower." 



Under similar conditions a 2^-horsepower gas engine lifted 2.35 times 

 the water pumped by the mill. The indicated horsepower of the engine 

 in these trials was 1.8, the effective horsepower 1.02. 



"During a 6-hours' run with this engine there were lifted to a height of 12.85 ft. 

 13,202 2 cu. ft. of water, with a consumption of 458 cu. ft. of gas, costing $1.25 per 

 thousand. This is a cost for fuel of 95.4 cts. per day of 10 hours' work." 



From tests of the mill in grinding corn when the wind velocity was 

 from 9 to 30 miles per hour, it is calculated that — 



"the total amount of feed which could be ground by the mill in a year was 871,500 

 lbs. or 15,560 bu. of 56 lbs. Grinding trials were also made with a Webster 2£- 

 horsepower gas engine, and its rate was found to be 6,408 lbs. per day of 10 hours 

 with a cost of fuel of 99 cts. The windmill was therefore able to do during the year 

 the equivalent of 136 days of the 2.5-horsepower engine." 



It was found that the loss of energy in the offset pulleys was .18 

 horsepower, and in the entire system of shafting, including the offset 

 pulleys, .767 horsepower, when the shaft was making 500 revolutions 

 per minute. 



The sanitation of farm buildings, J. Scott {Trans. Highland and Agr. Soc. Scotland, 

 5. ser., 9 {1897), pp. 40-60, figs. 7). — The topics discussed are sanitary legislation, 

 requirements for health, site and foundations, ventilation, lighting, drainage, con- 

 servancy, water supply, lambing folds, and disinfectants. 



