IMPORTANT WORKS ON ELECTRICITY. 



THE MODERN APPLICATIONS OF ELECTRICITY. 



By E. Hospitalier. Translated and enlarged by Julius Maier, Ph. D. With 170 

 Illustrations. 8vo. Cloth, $4.50. 



" M. Hospitalier distinguishes three sources of electricity, namely, the decomposition of metals 

 or other decomposable bodies in acid or alkaline solutions, the transformation of heat into elec- 

 trical energy, and lastly the conversion of work into current giving rise to the three specific 

 modes of force styled respectively galvanism, thermo-electricity, and dynamic electricity. He 

 gives a history of the progress of each, from the first crude constructions of the pioneer to the 

 latest and most perfect form of battery, thus furnishing the student of science with a sufficiently 

 copious text-book of the subject, while at the same time affording to the electrical engineer a 

 valuable encyclopaedia of his profession. The work presents a most useful and thorough com- 

 pendium of the principles and practice of electrical engineering, written as only an expert can 

 write, to whom tbe abstruse by long study has become simple. The translator has acted the part 

 of an editor also, and has added considerable material of value to tbe original text. His account 

 of the Elison. Fox, and Brush systems of lighting, for example, is more complete than that of 

 M. Hospitalier in his second edition. He has also added full descriptions of the fire-damp indi- 

 cators of Liveling, Sourzee, and Mounier; of Bright's fire alarm and district telegraph, and of 

 Dolbear's telephone, and Kelway's electric log, together with other recent inventions not men- 

 tioned in Hospitalier's treatise, exhaustive and excellent as it is." New York Times. 



" To one who wishes to understand the rationale of electric science, and the methods by which 

 the numerous results are accomplished, the work will be welcome." Chicago Tribune. 



"The vast advance made within the past few years in electrical science gives great interest to 

 a work as complete and authoritative as the one before us." Cincinnati Daily Gazette. 



"A very stimulating and fascinating treatise." Philadelphia Press. 



A PHYSICAL TREATISE ON ELECTRICITY AND MAGNETISM. 



By J. E. H. Gordon, B. A., Assistant Secretary of the British Association. 2 vols., 

 8vo, with about 200 full-page and other Illustrations. Cloth, $7.00. 



"There is certainly no book in English we think there is none in any other language which 

 covers quite the same ground. It records the most recent advances in the experimental treatment 

 of electrical problems, it describes with minute carefulness the instruments and methods in use 

 in physical laboratories, and is prodigal of beautifully executed diagrams and drawings made to 

 scale." London Times. 



"The fundamental point in the whole work is its perfect reflection of all that is best in the 

 modern modes of regarding electric and magnetic forces, and in the modern methods of construct- 

 ing electrical instruments." Engineering. 



"Too great praise can not well be given to the description, illustration, and modes of using 

 modern instruments." Electrician. 



THE SPEAKING TELEPHONE, ELECTRIC LIGHT, AND OTHER 

 RECENT ELECTRICAL INVENTIONS. 



By George B. Prescott. New edition, with 200 additional pages, including Illus- 

 trated Description of all of Edison's Inventions. 214 Illustrations. 8vo. 

 Cloth, $4.00. 



" Mr. Prescott's work on recent electrical inventions beincr American, is naturally largely occu- 

 pied with the results of Mr. Edison's researches and the work of other distinguished Americans, 

 though it is by no meaus limited to the results obtained on the other side of the Atlantic. It is a 

 magnificently illustrated volume, and is the most complete history and discussion of telephones 

 and allied instruments and tbe electric litrht which has come under our notice. It will probably 

 remain a standard work until the progress of discovery haves it behind, for every instrument^ oi 

 which it treats is explained so fully and illustrated so well that there is but lutle room lelt for 

 improvement. For the student and all who have sufficient knowledge or interest in tbe subject, it 

 will be a valuable magazine of information." WextminUer Peri* w. 



For sale by all booksellers; or sent by mail, post-paid, on receipt of price. 



New York: D. APPLETON & CO., 1, 3, & 5 Boud Street. 





