710 EXPERIMENT STATION RECORD. 



1889-1901. The report gives directions for all classes of road work, including grading, 

 building culverts, and wooden, steel, and reenforced concrete bridges. 



Hydraulic motors, I. P. Church (New York: Joint Wiley & Sons, 1905, pp. IX-\- 

 269, figs. 125, dgms. 7). — This book includes both the theory and descriptions of 

 water wheels, impulse wheels, turbines, centrifugal pumps, pressure engines, accumu- 

 lators, and hydraulic rams. It represents the most modern treatment of these 

 important lines of machinery. 



A brief discussion is also given of flow in pipes and open channels and backwater 

 due to weirs. An appendix contains graphic conversion scales, diagrams showing 

 friction head loss and discharge of cast-iron and wrought-iron pipe for various veloci- 

 ties, diagrams of Kutter's formula, four-place logarithms, and three-place trigono- 

 metric functions. 



A steam traction engine, R. Dessaisaix (Jour. Agr. Prat., n. ser., 9 (1905), No. 

 24, pp. 774, 775, fig. 1) . — An improved English engine, with large heating area, and 

 adapted to burning wood and refuse. 



Methods of testing- farm machines, A. Xachtweh (Folding's Landw. Ztg., 54 

 (1905), Nos. 19, pp. 663-667, figs. 3; 22, pp. 769-775, figs. 5).— A description of a 

 recording dynamometer for farm vehicles, with notes on its use; a dynamometer 

 with a hydraulic registering device, a recording torsion dynamometer by Morin, and 

 a simplified form by Wiist. 



New farm machinery, E. TVrobel (FuhMng's Landw. Ztg., 54 (1905), Xo. 18, pp. 

 625-628, figs. 4). — A description of a new driving gear to reduce friction in fanning 

 mills, improved interchangeable screens for threshing machines, and an improved 

 universal seed drill. 



New farm machinery, A. Nachtweh (Finding's Landw. Ztg., 54 (1905), No. 19, 

 pp. 667-671, figs. 4). — Anew universal farm mill adapted to both crushing and rough 

 grinding. The rolls are smooth for half their length, being geared for both equal 

 and unequal rates of speed. 



New farm machinery, K. Yormfelde (Fuhling's Landw. Ztg., 54 (1905), No. 20, 

 pp. 695-701, figs. 4). — A carbureter for making Benoid gas and a special gas engine 

 for using this gas are described. 



New farm machinery; the Heller plow for subsoiling, B. Tolksdorf (Find- 

 ing's Ldndw. Ztg., 54 (1905), No. 16, pp. 555-557, fig. 1).— Thorough subsoiling with- 

 out heavy draft is claimed in this plow, which is constructed with a wedge-shaped 

 subsoiler attached to an ordinary moldboard in such' a way that the under layer of 

 soil is moved laterally the width of one furrow without being turned over, the upper 

 soil being turned over on top of the moved strip of subsoil. 



RURAL ECONOMICS. 



The state and agriculture in Hungary, I. Daranyi, trans, by A. Gyorgy 

 (London: MacmiUan &• Co., Ltd., 1905, pp. XXlI-\-264, map 1) . — This book is a dis- 

 cussion of the principles followed and the methods used by the Department of 

 Agriculture of Hungary in the promotion of the agricultural interests of that country. 



The questions of land tenure and fiscal policy are left on the side, and attention is 

 centered upon the problems involved in improving the quality of cereals, hops, 

 hemp and flax, wine, fruits, live stock, etc. "The intention in generally encour- 

 aging the agricultural industry was directed by the desire that our farmers, in the 

 first place the small farmers, should be convinced of the advantages of 'qualitative 

 production,' of using better seeds, producing more commercial plants, and, in gen- 

 eral, of farming on a more scientific plan." 



Cooperation among the farmers is encouraged by the government. "Acknowl- 

 edging the great influence which farmers' clubs exercise on the development of 



