

Just out, with 26 Plates and over 700 Illustrations. 21/- not. 



PHYSIOGRAPHY. 



By ROLLIN D. SALISBURY, 



Professor ol Geology tod Head of the Department of Geography in tie University of Chicago. 



" Prof Salisbury's new book may be read with much advantage by the English 

 Student, who will find it a wholesome thing to look at physiograplucal subjects from 

 what in many cases will be a fresh point of view. ... A notable feature, worthy of 

 much commendation, is the introduction of map-exercises, so devised as to give the 

 student a thorough grasp of the meaning of topographical maps ... Good illustra- 

 tions are of first importance, and the work before us is amply and beautifully 

 illustrated."— Athrn.eum. . . 



The whole subject is covered in a clear and fascinating style . . . wealth of 

 illustrations . . . these are beautifully reproduced, and drive through the eye the 

 propositions set forth in the text."— SCOTSMAN. 



JOHN MURRAY, Albemarle Street, W. 



Just out, with numerous Diagrams and Illustrations. 



12S. 6d. net. 



MICROSCOPY: 



The Construction, Theory, and 

 Use of the Microscope. 



By EDMUND J. SPITTA, F.R.A.S., F.R.M.S., etc., etc. 



NATURE says:— 

 " From this point of view, let us hasten to urge every student of the microscope who rvishes to 

 tain a tholouKh understanding oi its principles and possibiht.es and Us defects, and every user of 

 fhe instrument who T desires a work of reference to which he may turn for an explanation of some 

 un-Sned optical phenomenon, or for particulars of up-to-date apparatus,. to procure a copy ■ of 

 Mr. Ipitta's book without delay. It is a leisurely book-an unfriendly critic might even call it diffuse 

 h,?Vnlreir S c^celv a chanter which will not repay careful reading ; and when one comes to the 

 chafer on" TesU«g • (ftfectiXs/ F Jne «n but feel grateful to Mr. Spitta for his admirable treatment of 

 a difficult subject." 



JOHN MURRAY, Albemarle Street, W. 



Scale of Charges for Advertising In "Science Progress." 



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All applications for space to be made to . 



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Mr. H. A. COLLINS, 27, St. Peter's Road, Croydon. 



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