August 17, 1905J 



NA TURE 

 TSnLT^, Si^TJ -EfEt A^^V ^ 



cli 



PROGRESSIVE SCIENCE SERIES. 



Large Svo, cloth e^tra, 6^. net per volume. 



rOLCJIE. 



Seismolog-y. 



By Clarence Edward Button, 



LATEST 



EARTHQUAKES. In the Light of the new 



Major in the United States Army. Illustrated. 



OTHEJt 



EXPERIMENTS ON ANIMALS. By Stephen 



PAGET, F.R.C.S. With an Introduction by Lord 

 Lister. New and Revised Edition. 



INFECTION AND IMMUNITY. By George S. 



Sternberg;, M.D., Surijeon-General to the U.S. Army, 

 Retired. 



THE STARS. A Study of the Universe. By 



Professor NEVVCOMB. 



RIVER DEVELOPMENT. As Illustrated by 



the Rivers of North America. By Professor I. C. 

 RUSSELL. Illustrated. 



EARTH SCULPTURE. By Professor Geikie, 



LL.D., F.R.S. Second Edition. Illustrated. 



Tin It It KDITKty. 



THE RECENT DEVELOPMENT OF PHYSICAL SCIENCE. 



By W. C. D. WHETHAM, M.A., F.R.S., 



Fellow of Trinity College, Cambridge. Illustrated. Large Crown Svo. ^s. bd. net. 

 " Mr. Whetham'i book will be welcomed. Its appearance is highly opportune. There probably never was a time when a clear and 

 compendious account of contemporary physical research was more needed. . . . He has performed a difficult task with conspicuous 

 success. His exposition is as clear and simple as the nature of the subject permits, and his language is felicitous." — The Times. 



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JOHN MURKAV, ALBEMARLE STREET, \V. 



VOLVMEH. 



THE COMPARATIVE PHYSIOLOGY OF THE 



BRAIN AND COMPARATIVE PSYCHOLOGY. By 



Professor JACQUES LUEB, M.D., Profes.sor of Physi- 

 ology in the University of Chicago. 



THE STUDY OF MAN: An Introduction to 



Ethnology. By Professor A. C. H.\DDON, D.Sc, 

 M.A. illustrated. 



VOLCANOES. By Professor Bonney, D.Sc, 



F.R.S. Illustrated. 



THE GROUNDWORK OF SCIENCE. By 



ST. GEORGE MIVART, M.D., Ph.D., F.R.S. 



A BOOK OF WHALES. By the Editor of the 



Series, F. E. BEDDARD, M.A., F.R.S. With 40 

 Illustrations by Sidney Berridge. 



VOGEL'S 

 SPECTROGRAPH. 



Two prisms of dense flint-glass enclosed 

 in a strong brass case, to which the colli- 

 mator and the camera are attached ; 

 collimator of ijin. aperttire and iSin. focal 

 length, with adjustable slit with micrometer- 

 screw and dividing drum ; the camera is 

 furnished with an achromatic double 

 objective of 2in. aperture and .":9in. focal 

 length ; size of plate, yiin. by 5m. 



C?in he seen at my Showrooms 

 as helow- 



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LONDON, W.C. 



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GRAND PRI.X, PARI5, 1900; ST. LOUIS, 1904- 

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