PHYSICS. 489 



Dae Potential und sein Anivendung bei der Erkliinnig Elek trische Erscheinungen. O. 

 Tumlirz. 8vo. pp. 202. Wien, 1884. 



Die Generatoreu hochgespannter Elektricitiit mit vorwiegender Beriicksichtigungdor 

 Elektrisirmaschinen in engeren Sinne. J. G. Wallentin. 8vo. pp. 202. Wien, 

 1884. 



Historia y progresos de la electricidad. J. Gomez y Pallete. 8vo. pp. 48. Madrid, 

 1884. 



La elettricit^ e le sue applicazioui. E. Bignami. 8vo. pp. 219. Milan, 1884. 



A practical treatise on electric lighting. J. E. H. Gordon. 8vo. pp.228. London, 

 1884. (Low.) 



Sistema de transmisidn telegr^fica. R. Hernandez. 4to. pp. 38. Bueuos Aires, 1883. 



E^sum^ d'exp^riences sur la determination de I'ohm et de sa valeur en colonne mer- 

 curielle. Mascart, F. de Nerville, & R. Benoit. .8vo. pp. 71. Paris, 1884. 



A pocket-book of electrical rules and tables for the use of electricians and engineers. 

 J. Munro and A. Jamieson. 32rao. London, 1884. 



The practical telegraphist and guide to the telegraph service. W. Lynd. 8vo. pp. 

 220. London, 1884. 



II telefono. V. Piccoli. 16mo. pp. 119. Milano, 1884. 



Electrical appliances of the present day. D. P. Heap. 8vo. pp. 287. New York, 

 1884. 



Recent progress in dynamo-electric machines, being a supplement to "Dynamo- 

 electric machinery." S. P. Thompson. 24mo, pp. 113. New York, 1884. 



Laran om magnetism och elektriciteteu. A. Wijkauder. 8vo. pp. 129. Lund, 1884. 



The electric light; its history production and applications. E. Algeave and J. Bou- 

 lard. Translated by T. O'C. Sloane. 8 vo. pp. xviiij 458. New York, 1884. 



Magneto-electric and dynamo-electric machines; their construction and practical ap- 

 plication to electric lighting and the transmission of power. H. Schellen, 

 Translated from the 3d German edition by U. S. Keith and Percy Neymann. Vol. 

 1. 8vo. pp. 510. New York, 1884. 



Eecherches sur la conductibilit6 galvanique des dlectrotytes. S. Arrhenius. 8vo. 

 pp. 152. Stockholm, 1884. * 



Dynamo-electricity; its generation, application, transmission, storage, and measure- 

 ment. G. B. Prescott. 8vo. New York. 



Le transport de la force par l'61ectricit6 et ses applications industrielles. M. Deprez 

 & Japing. 8vo. Paris, 1884. 



Die Kabeltelegraphie. M. JUllig. 8vo. pp. 272. Wien, 1884. 



Manuale di magnetismo ed elettricitk. G. Poloni. 16mo. pp. xi, 203. Milano, 1884. 



Die Electricitat und ihre Anwendungen. A. Wassmuth. 8vo. pp. 202. Leipzig, 

 1884. 



Bell's electric speaking telephone ; its invention, construction, application, modifica- 

 tion, and history. G B. Prescott. 8vo. pp. 350. New York, 1884. 



