AGRICULTURAL ENGINEERING. . 405 



-where the crops, the climate, and the soil are very different from those of America, 

 but that the principles of these implements are capable of adoption in that country- 

 and often even the implements themselves, with very slight modifications. He 

 urges the importance of wider use of such labor-saving implements. 



The American plow for the Russian trade {Amei\ Inventor, 9 {1902), No. 14, 

 pp. '214, 215, figs. 8). — Illustrated descriptions of the kinds of plows used by Russian 

 farmers. 



Hay or straw baling presses, A. J. Pebkins {Jour. Agr. and Ind. South Anstralia, 

 6 {1902), No. 2, p]i. 91-96, figs. 7). — A brief discussion of the work of certain recently 

 introduced continuous baling presses. 



Horsepower as indicating work of steam and oil engines, W. R. Jamieson 

 {Jour. Agr. and Ind. South Au.^tralia, 6 {1902), No. 2, pp. 106, 107).— \ brief expla- 

 nation of the terms brake horsepower, indicated horsepower, and normal horse- 

 power. The first is said to represent "the useful power of wdiich an engine is capa- 

 ble." The indicated horsepower is about 10 per cent higher, while the normal 

 horsepower is about two-fifths of the brake horsepower. 



The modern harvest field {Country Life [London], 12 {1902), No. 296, pp. 318, 

 319, figs. 2). — Mainly a discussion of the use of motors for driving harvesters, plowing 

 the stul)ble, and other purposes, with brief reference to a petroleum motor recently 

 tiied for these purposes in Lincolnshire, England. 



On injection motors, L. Lecornu {Conipt. lii'iid. Acad. Sci. Paris, 134 {1902), No. 

 26, j>p 1566-1568) . 



Proceedings of the Third Annual Good Roads Convention of the Boards of 

 Supervisors of the State of New York ( U. S. Dept. Agr., Public Road Inquiries 

 Bui. 22, pp. 63, 2}h. 13). — Proceedings and papers of the convention held at Albany, 

 N. Y,, January 28 and 29, 1902. The information contained in this bulletin relates 

 especially to the advantages of the State-aid plan as practiced in New York. Among 

 the papers presented were A Few Practical Suggestions on Road Building, by C. W. 

 Ross; The League of American Wheelmen and the 'Good Roads' Law, by L. H. 

 Washburn; Wide Tires, by F. M. Power; The Press and Good Roads, by A. H. Bat- 

 tey; Relation Between Macadam Roads and Electric Street Railways, by E. P. North, 

 and The Relation of Common Roads to Railroads, by L. M. Haupt. 



Pennsylvania's road system, J. Hamilton {Pennsylvania Dept. Agr. Rpt. 1901, 

 pt. 1, pp. 554-558). — A brief account of the improvements that have been made and 

 of the needs of the system. 



City roads and pavements suited to cities of moderate size, W. P. Judson 

 {New York: The Engineering Neivs Pub. Co., 1902, pp. 195, figs. 67). — This is the second 

 revised and enlarged edition of a work first issued several years ago. In this revision 

 special effort has been made to incorporate the latest information with reference par- 

 ticularly to concrete liase, block stone, wood, vitrified brick, asphalt, and bituminous 

 pavements, and )jroken-stone roads. 



New covering for roads {Tradesman, 48 {1902), No. 4, p. 71). — A brief refer- 

 ence to a report by the United States consul at Rouen calling attention to the use in 

 France of a mixture of blast-furnace slag and tar as a covering for roads. It is 

 claimed by the inventor, who is an Englishman, that when carefully pressed down 

 with heavy rollers the covering renders the surface of the road impervious to water 

 and free fi'om dust. 



Road making from the engineer's standpoint, A. W. Campbell {Pennsylvania 

 Ih'iit. Agr. Rpt. 1901, pt. 1, pp. 428-436). — A general discussion of this subject. 



Road building w^ith convict labor in the Southern States, J. A. Holmes 

 ( r. ,S'. Dept. Agr. Yearbook 1901, pp. 319-332, pis. 5). 



Government cooperation in object-lesson road wojrk, M. Dodge ( V. S. Dept. 

 Agr. Yearbook 1901, pp. 409-414, pis. 2). 



