MESSRS. LONGMANS' WOBES ON MEDICINE, SURGERY, ETC.19 



OPTICS, PHOTOGRAPHY, ETC. 



ABNEY. A TEBATISB ON PHOTOGEAPHY. BySirWiLLiAM 

 DE WIVBLESLIB ABNEY, K.C.B., F.R.S. With 134 Illustrations. 

 Crown 8vo, 5s. 



BALY. SPBCTEOSCOPy. By B. 0. C. BALY, P.I.C, Professor of 

 Chemistry in the University of Liverpool. With 163 Illustrations. Orown 

 8vo, 10s. 6d. 



DRUDE. THE THEOEY OF OPTICS. By PAUL DRUDE, Pro- 

 fessor of Physios at the University of Giessen. Translated from the 

 German by 0. RIBOBG MANN and ROBERT A. MILLIKAN, Professors 

 of Physios at the University of Chicago. With 110 Diagrams. 8vo, 15s. net. 



GLAZEBROOK. PHYSICAL OPTICS. By B. T. GLAZEBROOE, 

 M.A., P.R.S. With 183 Woodcuts of Apparatus, etc. Crov?n Svo, 6s. 



MEES. AN ATLAS OP ABSOEPTION SPBGTEA. By C. E. 

 KENNETH MEES, D.Sc. Orown Svo, 6s. net. 



POLLOK. PEACTICAL SPECTEOGEAPHIC ANALYSIS. By 

 J. H. POLLOK, D.Sc. Crown Svo. 



SHEPPARD AND MEES. INVESTIGATION ON THE 

 THEOEY OF THE PHOTOGEAPHIC PEOCBSS. By S. 



B. SHEPPARD, D.Sc. (Lond.), 1851 Exhibition Scholar of University 

 College, London, and 0. E. KENNETH MEES, D.Sc. (Lond.). With 65 

 Illustrations and Diagrams. Crown Svo, 6s. Gd. net. 



VANDERPOEL. COLOUE PEOBLEMS : a Practical Manual for 

 the Lay Student of Colour. By EMILY NOYES VANDERPOEL. With 

 117 Plates in Colour. Square Svo, 21s. net. 



WRIGHT. OPTICAL PEOJECTION : A Treatise on the Use of the 

 Lantern in Exhibition and Scientific Demonstration. By LEWIS 

 WRIGHT, Author of " Light : a Course of Experimental Optica ". With 

 243 Illustrations. Crown 8vo, 6s. 



