292 EXPERIMENT STATION" RECORD. , 



(pp. 41-43) ; Permanent Bridges, by J. A. Bell (pp. 44-48) ; and Peel County 

 Roads, by C. R. Wbeelock (pp. 49-51). 



Jacket water requirements of internal combustion engines, R, Tratjtschold 

 {Power, 37 {1913), No. U, pp. 4H~496, figs. S).— Results of tests of the effect of 

 load on fuel and jacket water consumption show that at § load, about the 

 lightest load that an engine in an efficient installation is called upon to carry, 

 the fuel requirements per horsepower were 54.5 per cent greater than when 

 operating under full load, while the jacket water requirements were 2.85 times 

 as great as under the more efficient operation. Considering 35° F. as the 

 minimum and 80° as the maximum practical entrance temperature for the 

 jacket water supply, tests of the effect of supply temperature on jacket water 

 consumption show that at 35°, the water consumption with f load was 2.785 

 times the consumption at full load, and at 80°, 2.2 times the consumption at 

 full load. These tests also showed that the water consumption at full load 

 and at 80° entrance temperature was 1.422 times the consumption at full load 

 and at 35° entrance temperature. 



Reciprocating pump curves, A. M. Daniels (Poicer, 37 (1913), No. Ui, pp. 

 488, 489, fig. 1). — This article describes the construction and use of curves for 

 determining the size of reciprocating pumps required under given conditions. 



Slippage of reciprocating pumps, M. K. Baer {Poioer, 37 {1913), No. 14, 

 pp. 482, 483, figs. 2).^Test results of reciprocating pumps show the fallacy of 

 the assumption that the average slip of reciprocating pumps is about 5 per cent, 

 and indicate that the slip will vary from 5 to 85 per cent, depending on the 

 condition of the pump, the discharge pressure, and the piston speed. 



New features in the construction and operation of plowing implements 

 and motor plows, P. Gisevius {Landio. Hefte, 1913, No. 14, pp. 35, figs. 39).-— 

 This pamphlet describes new features in the construction of plow frames, 

 hitches, and the working parts of plows, and deals with steam, electric, and 

 internal combustion power in their latest application to the various methods of 

 motor plowing. 



Report of tests of potato sprayers, S. Lako et al. {Meded. Rijks Hoogere 

 Land, Tuin en Boschboinosch. [Wageningen'], 5 {1913), No. 5, pp. 253-261).— 

 The results of competitive tests of 6 horse-drawn potato sprayers are reported. 

 The machines were to cover a width of 10 ft. without damaging the crop. 



An English machine gave the be.st results, due to its greater simplicity and 

 ease of operation. This machine consists of a car and ti'uck, with wheels 44 

 in. in diameter which can be set 43 to 71 in. apart. A wooden barrel is set 

 between the wheels from which the liquid is drawn by a direct-acting suction 

 and force pump and forced under pressure into the spray pipe. The pump is 

 equipped with an air chamber and spring valves to regulate the pressure and 

 flow of the liquid. This machine applied from 50 to 200 gal. of lime-sulphur 

 per acre, spraying 5 rows at a time. 



The army horseshoer {Wai- Dept. [U. S.]. Doc. 4^3, 1912, pp. 106, pi. 1, 

 figs. 66).— This is a manual prepared for the use of students of the Training 

 School for Farriers and Horseshoers. It contains chapters on the following: 

 (1) Horseshoers' tools and their uses, the forge; (2) the fire, heats; (3) work- 

 ing and shaping iron, the plate shoe; (4) anatomy and physiology of the 

 horse's foot; (5) normal shoeing; (6) gaits, shoeing to conform or alter same, 

 faults in gaits, shoeing to correct same, and the making of shoes for special 

 gaits; (7) diseases, the making of pathological shoes; and (8) shoeing refrac- 

 tory horses. 



[Plans and estimates for the construction of a swine-fattening establish- 

 ment], F. E. voN Braun {Landiv. Jahrb. Bayeni, 2 {1912), No. 3, pp. 153-164, 

 figs. i2).— Situation and detailed woi-kiug plans are given of hog feeding and 



