EUKAL ENGINEERING. 891 



How to install the farm gasoline engine, G. H. Mathe\\ son (Gas Power, 

 13 {1916), No. 8, pp. 10, 12, 14, figs. 5). — Brief hints are given regarding the 

 installation of an engine, special reference being made to the construction 

 of a proper foundation. 



Antifreezing solutions for your engine, C. P. Shattuck (Gas Power, 13 

 (1916), No. 8, pp. 54, 56). — Ways' and means of preventing frozen radiators and 

 cracked cylinders are briefly described, and a table showing the combinations 

 and freezing points of calcium chlorid solutions, alcohol, glycerin, and glycerin 

 and alcohol mixtures is given. 



General notes on power farming, E. R. Wiggins (Power Farming, 25 (1916), 

 No. 1, pp. 18, 19). —Data, on operating the cream separator, on gas engine oper- 

 ation and efficiency, and on grinding feed with an engine are briefly pre- 

 sented. 



Directory and specifications of gasoline and oil farm tractors (Farm 

 Machinery, No. 1265 (1916), pp. 40-4^). — This is a second directory, said to be 

 complete to date. 



The latest idea in tractor harvesting, E. L. Watson (Gas Power, 13 (1916), 

 No. 8, pp. 5, 6, fig. 1). — ^A means devised and used for operating the binder 

 levers from the engine seat consisted of disconnecting the bundle carrier 

 trip rod and attaching it to a foot lever on the engine frame, transferring the 

 binder shifting lever from the seat pipe and the lever for raising and lower- 

 ing the reel to the stub tongue within easy reach of the operator. 



The daily working capacities of motor plows and formulas for their de- 

 termination, Thallmayer (Mitt. Deut. Landio. Gesell., 30 (1915), No. 52, pp. 

 791-794). — The results of different tractor plowing tests are reviewed, with 

 special reference to the relation between brake and drawbar horsepower, depth 

 of plowing, actual hours of work, etc. 



The following formula for the determination of daily plowing capacity of 



tractor plows is proposed: F=27 ^'^ j^ — , in which F=area plowed in 



hectares, Z=gross hours of work, ^=brake horsepower of tractor, f=depth 

 of plowing in centimeters, W=soil resistance in kilograms per square deci- 

 meter, and a and ^ are coefficients, the former indicating the relation between 

 gross and net working hours and the latter the relation between brake and 

 drawbar horsepower. The review of test results shows that a averaged about 

 0.75 and /S about 0.52 for gas tractors, about 0.73 for steam tractors, and about 

 0.64 for motor plows. 



The practical value of model tests on the plow, B. Bebnstein (Mitt. Verb. 

 Landtv. Mascli. PriifUngsanst., 9 (1915), No. 1, pp. 9-24, ficis. 3). — ^This is a 

 mathematical and graphical discussion. 



Trial of steam thrashers at Lyallpur, W. Robebts (Agr. Jour. India, 10 

 (1915), No. 3, pp. 285-287, pis. 2). — A comparison of the work of a 30-in. and a 

 48-in. thrasher in thrashing wheat is said to indicate the marked superiority 

 of the 48-in. machine. 



Using the modem grain separator, G. F. Conner (Power Farming, 25 

 (1916), No. 1, pp. 9, 40, 4i> flffs- 4)- — This is a brief description of the mechanical 

 details of the grain separator in its present stage of development. 



Test of a separator for cold milk of a capacity of 220 liters per hour, 

 A. Nachtweh (Mitt. Verb. Landw. Masch. PriifUngsanst., 9 (1915), No. 1, pp. 

 32-43. figs. 3). — A machine for the separation of cream from cold milk is de- 

 scribed and diagrammatically illustrated, and tests are reported with milk at 

 temperatures varying from 3 to 15° C. (37.4 to 59° F.). 



The main difference between this machine and those for the separation of 

 warm milk is that the cylinder is larger and the size and number of disks 



