THE ROMANCE OF SCIENCE continued 



COLOUR MEASUREMENT AND MIXTURE 



By Sir W. DEW. ABNEY, K.C.B., R.E., D.C.L., F.R.S. With 

 several Illustrations. Post 8vo, cloth boards, 2s. 6d. 



Nature says : " This interesting little book is full of careful and important 

 observations. It is, in fact, a summary of the results arrived at by the 

 author during his careful and laborious investigation of the properties of the 

 spectrum." 



OUR SECRET FRIENDS AND FOES 



By PERCY FARADAY FRANKLAND, Ph.D., LL.D., M.Sc., F.R.S., 

 Professor of Chemistry in the University of Birmingham. Fifth 

 edition. With several Illustrations. Post 8vo, cloth boards, 3^. 



The Lancet says : " These lectures afford a large amount of information 

 on the subject of bacteriology, and the results which have been obtained by 

 the careful study of those low forms of life commonly known as germs or 

 micro-organisms which has been so keenly pursued of late years." 



SOAP BUBBLES, AND THE FORCES WHICH 

 MOULD THEM 



By C. V. BOYS, A.R.S.M., F.R.S., Assistant Professor of Physics at 

 the Royal College of Science, South Kensington. Eighth thousand. 

 With numerous Diagrams. Post 8vo, cloth boards, 2s. 6d. 



The Daily Chronicle says : " One of its best features is that it contains 

 detailed information for making each piece of apparatus used in performing 

 the experiments." 



TURBINES 



By Engineer-Commander A. E. TOMPKINS, R.N., late Instructor in 

 Steam and Marine Engineering, etc., at the Royal Naval College, 

 Greenwich, and Lecturer at the Royal Naval War College. With 

 about one hundred Illustrations. Second edition, with additional 

 Illustrations. Post 8vo, cloth boards, 3$. 6d. 



The Practical Engineer says : " This is an instructive book, written in 

 popular language, giving a good elementary insight into the principles and 

 practice of turbine engineering. . . . The chief interest is centred in the 

 steam turbine, of which the principles and essential features come in for 

 very graphic treatment. " 



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