E. & F. N. SPON, 16, BUCKLERSBURY, LONDON. 



ELECTEICITY. 



Scientific Researches, experimental and theo- 

 rectical in Electricity, Magnetism, Galvanism, 

 Electro-Magnetism, and Electro- Chemistry, illus- 

 trated with engravings, by William Sturgeon, 

 royal 4to, cloth, 21s. 



ELECTEO-METALLIJEGY. 



Contributions towards a History of Electro- 

 Metallurgy, establishing the Origin of the Art, 

 by Henry Dircks, crown 8vo, cloth, 4s. 



ENGIN BEES' POCKET BOOK 



A Pocket Book of useful Formulae and Memo 

 randa for Civil and Mechanical Engineers, by 

 Guildford L. Molesworth, Member Institute Civil 

 Engineers, Chief Eesident Engineer Ceylon Hail- 

 way, sixth edition, with a supplement, royal 

 32mo, roan, 4s. 6d. ; the supplement can be had 

 separate, price 3d. 



" Mr. Molesworth has done the profession a considerable and lasting- 

 benefit by publishing his very excellent Pocket-Book of Engineering 

 Formula;. What strikes us first, is, the very convenient size and form 

 of the book adopted by the author, and next in glancing over its con- 

 tents \ve are pleased to find many really useful things not found else- 

 where in any Engineering Pocket-Book. Mr. Molesworth's treatment 

 of Hydraulics and Hydro- Dynamics, and Motive Power, generally, is 

 excellent. To the latter branch of his subject, Mr, Molesworth ha* 

 evidently devoted considerable attention, and his collection of formula? 

 will be found most useful. But to stop to detail everything that is 

 good and useful in this book would be nearly equal to re-printing a 

 list cf its contents." Artizan, April, 1863. 



ENGINEERS' PEICE BOOK. 



Appleby's Illustrated Hand-book and Prices cur- 

 rent of Machinery and Iron Work, with various 

 useful Tables of Eeference, compiled for the use 

 of Engineers, Contractors, Builders, British and 

 Foreign Merchants, &c., 8vo, cloth, 2s. 6d. 



FEENCH CATHEDEALS. 



French Cathedrals, by B. Winkles, from drawings 

 taken on the spot, by E. Garland, Architect, with 

 an historical and descriptive account, 50 plates, 

 4to, cloth, 18s. 



