990 



EXPERIMENT STATION RECORD. 



points : Safety of operation ; attendance veqnired ; consumption of fuel and 

 lubricants ; consumption of water : adequacy of regulation under a variable 

 load; steadiness of running; time required to start; fouling of the engine, and 

 the opportunity for quick and convenient cleaning; and ease of moving the 

 engine. Nine engines were used. The construction of the engines is described 

 and illustrated, and a table gives their principal dimensions. The results of 

 the tests are given in a series of tables, the contents of which are fully 

 discussed. 



The following table shows the fuel consumption and respective thermal 

 efBcieucies of the full load tests : 



Comparative test of small motors. 



Name of motor. 



Kind of fuel. 



Tasnir Benzene- 

 Daimler I AJcohoL 



Do. 



Low heat 



value of 



fuel. 



Deutz I do 



Do Benzol 



Hille Benzene 



Benzol 



Eeform Benzene 



Do Benzol 



Bichter Alcohol 



Scharrer & Gross do 



Do Alcohol-Ergin 



Calortex. 

 10,500 



5,500 



9,600 

 10,500 



9,600. 



10 jm 



9,600 

 5,3.50 

 5,350 

 7,550 



Metric 

 brake 

 horse- 

 power. 



4.0 

 3.2 

 2.83 

 2.83 

 3.7 

 3.66 

 3.0 

 3.61 

 2.98 

 2.93 

 2.98 

 2.95 

 2.8 

 2.84 

 2.76 

 .78 

 2.98 

 2.98 



Fuel con- 

 sumption 

 per metric 

 horse- 

 po-wer- 

 hour. 



Grams. 

 301 

 314 

 632 

 544 

 413 

 364 

 434 

 264 

 338 

 365 

 329 

 350 

 417 

 396 

 415 

 962 

 576 

 450 



Heat con- 

 sumption 

 per metric 

 horse- 

 power- 

 hour. 



Calories. 

 3,160 

 3,300 

 3,470 

 3,000 

 2,410 

 2,120 

 2,530 

 2,530 

 3.550 

 3,&30 

 3,160 

 3,360 

 4,380 

 4,150 

 3,980 

 5,140 

 3,060 

 3,400 



Thermal 

 efficiency. 



Per cent. 

 20.0 

 19.2 

 18.2 

 21.1 

 26.2 

 29.8 

 25.0 

 25.0 

 17.8 

 16.5 

 20.0 

 18.8 

 14.4 

 16.0 

 15.9 

 12.3 

 20.5 

 18.5 



Farm machinery and farm motors, J. B. Davidson and L. W. Ch.vse {New 

 York and Loudon, 1908, pp. VII +513, pi. 1, figs. 316). — This is intended as a 

 text-book on the subject. It is divided into two parts, (1) farm machinery, and 

 (2) farm motors. The first part contains chapters on definitions and mechan- 

 ical principles, transmission of power, materials, and the strength of materials, 

 tillage machinery, seeding machinery, harvesting machinery, haying machinery, 

 manure spreaders, threshing machinery, corn machinery, feed mills, wagons, 

 buggies, and sleds, pumping machinery, and the value and care of farm 

 machinery. Part 2 contains chapters on animal motors, windmills, steam boil- 

 ers, steam engines, gas, oil, and alcohol engines, traction engines, electrical 

 machinery, and the farm shop. 



College farm buildings, R. S. Shaw and J. A. Jefferv {Michigan Sta. Bui. 

 250, pp. 37-108, figs. 50). — A description of the farm buildings and fixtures at 

 the Michigan Agricultural College offered " with the thought that it may pre- 

 sent or suggest ideas of practical value and at the same time serve as a safe- 

 guard against some known errors." The topics discussed include the location 

 and grouping of farm buildings, yards, etc., and details as to the construction of 

 the new horse barn, the silos, the cattle and sheep bai'us and fixtures, and the 

 piggery and other equiiiment for swine raising. Plans and photographs accom- 

 pany many of the descriptions. 



