SCIENCE. 29 



ELEMENTARY CLASS-BOOKS Continued 

 MECHANICS. 



AN ELEMENTARY TREATISE. By A. B. W. 

 KENNEDY, C.E., Professor of Applied Mechanics in University 

 College, London. With Illustrations. [In preparation. 



STEAM. 



AN ELEMENTARY TREATISE. By JOHN PERRY, 

 Professor of Engineering, Imperial College of Engineering, 

 Yedo. With numerous Woodcuts and Numerical Examples 

 and Exercises. i8mo. 4J. 6d. 



" The young engineer and those seeking for a comprehensive knowledge 

 of the use, power, and economy of steam, could not have a more useful 

 work, as it is very intelligible, well arranged, and practical throughout." 

 IRONMONGER. 



PHYSICAL GEOGRAPHY. 



ELEMENTARY LESSONS IN PHYSICAL GEO- 

 GRAPH Y. By A. GEIKIE, F.R.S.> Murchison Professor 

 of Geology, &c., Edinburgh. With numerous Illustrations. 

 Fcap. 8vo. 4J. 6d. 



QUESTIONS ON THE SAME. is. 6a. 

 GEOGRAPHY. 



CLASS-BOOK OF GEOGRAPHY. ByC. B.CLARKE, M.A., 

 F.R.G.S. Fcap. 8vo. New Edition, with Eighteen Coloured 

 Maps. 3-y. 



NATURAL PHILOSOPHY. 



NATURAL PHILOSOPHY FOR BEGINNERS. By 

 I. TODHUNTER, M.A., F.R.S. Part I. The Properties of 

 Solid and Fluid Bodies. l8mo. 3*. 6d. 

 Part II. Sound, Light, and Heat. i8mo. 3*. 6d. 



SOUND. 



AN ELEMENTARY TREATISE. By W. H. STONE, 

 M.B., F.R.S. With Illustrations. l8mo. [Immediately. 



PSYCHOLOGY. 



ELEMENTAR Y LESSONS IN PSYCHOLOGY. By G. 

 CROOM ROBERTSON, Professor of Mental Philosophy, &c., 

 University College, London. [In preparation. 



Others in PreMration. 



