BURAL ENGINEERING. 789 



Motor plow test of the German Agricultural Society, B. Lichtenbebukb 

 (Dciit. Landw. Presse, JfO (1013), No. 86, pp. 1021-1020, figs. 11).— Nine dif- 

 ferent outfits were entered in this contest, 1 wire cable 2-engine outfit, 5 out- 

 fits with the tractor and plow separate, and 3 with combined tractor and plow. 

 In the main competitive tests fuel, water, and hibrication consumption ; speed 

 and efficiency of operation; width and depth of furrow, etc., were determined. 

 These were foltowed by a duration test under different conditions of soil and 

 atmosphere. 



All the outfits but one finished the duration test in good condition, but many 

 defects were noted in each. Two of the engines in systems having the engine 

 and plow separate did very good work in stony ground with moldboard plows, 

 evspecially the so-called "caterpillar" tractor. Likewise another such system 

 with moldboard plows and also a cable-drawn balance plow did good work 

 under poor conditions of soil. 



It is concluded from the results obtained that each of the three systems Las a 

 practical application for certain conditions. 



A year of mechanical cultivation, R. Babennes and H. de Marsay {Bui. 

 Soo. Agr. France. 191S, Nov. 1, pp. 2S0-2S9) .—TM^ reports a year's results of 

 mechanical cultivation oi>erations in the domain of B4gu6re, which indicate the 

 practicability, in conditions analogous to those of BeguSre, of introducing 

 mechanical power to replace the scarce and poor manual labor. 



Test of a refrigerating plant, J. Kezek {Mitt. Landw. Lehrkanz. K. K. 

 Hochsch. BodenkuL Wien, 2 {19 IS), No. 1, pp. 1-16, pi. 1). — A sulphur dioxid 

 refrigerating i)]ant for dairies is described and diagrammatically illustrated. 

 Tests of this plant indicate its refrigerating and ice-forming capacities and its 

 efficiency for the direct cooling of milk. 



A test of a cooling apparatus for cooling fresh milk in milk cans, R. 

 EicuLOFF {Ztschr. Landw. Kammer Braunschweig, 82 {19L3), No. 30, pp. S6^t- 

 366, figs. S). — ^A simple milk cooling apparatus is described consisting of tvvo 

 perts, a tank opening at the bottom into an open ended pipe and a second but 

 smaller tank opening at the bottom into a closed end pipe with a star section. 

 The first part is placed on the second part, fitting loosely, and the whole is 

 placed on a can of milk so that the two tanks are outside and the pipes extend 

 to the bottom of the can. The upper tank is filled with water which flows down 

 the pipe, out into the pipe with star cross section, back up into the second 

 tank, and over the outside of the milk can, thus effecting a double cooling 

 inside and outside. 



Tests of this apparatus indicate its simplicity and practicability for the 

 rapid cooling of milk for immediate commercial purposes, and show that three 

 times filling of the upper tank with water results in a suitable temperature of 

 the fuilk in about 30 minutes. 



[Farm house heating], A. A. Pottek {Country Gent., 78 {1913), No. ^6, pp. 

 1676-1678, figs. S). — This article describes and diagrammatically illustrates 

 simple systems of hot air, hot water, and steam heating for country homes, 

 and points out the chief factors to be considered in the selection, installation, 

 and manipulation of a system. 



Ozone water-pHirifying apparatus {Elc^t. Worldi 62 {1913), No. 24, pp. 1231, 

 1232, fig. 1). — Two types of small ozone water purifiers are d(.\scribed, one for 

 use in residences and the other for factories. A filter is a necessary adjunct of 

 the ozonizing apparatus in places where the water is turbid. 



Water, its properties and practical uses. — XX, [The septic tank system], 

 F. W. TowEB {Dom. Engin., 65 {1913), No. 9, pp. 270, 271, figs. 2).— This 

 article presents the theory of operation of a septic tank in concise form and 



