Junt out, with 26 Plates axtd over 700 Illustrations. 21/- net. 



PHYSIOGRAPHY. 



By ROLLIN D. SALISBURY, 



P rolcsixir of Qnhjff m4 Htaii ot the Department of Qcotraphy i'- ; icaco. 



in a clear and fa.-!cinating style . . . wealth of 



,\v renrodnrfil. :\nil ilrivi- f)ir(iii<'h thf ,v,- t)ii=> 



JOHN MURRAY, Albemarle Street, W. 



Just ouiy ivith numerous I?ia^?'ams and Illustrations. 

 12s. 6d. net. 



Ml 



The Construction, Theory, and 

 Use of the Microscope. 



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



ECHANIC says :— 



one feels that one has acquired so much useful information 



save by personal research, for which, by the way, our Author 



The properties of lenses are lucidly discussed, while every 



De and its workings are fully explained. The work indeed 



-. and is presented in such a form, that one has but to scan it to 



^irc to own a copy as a standard work of reference." 



jv^iIN MURRAY, Albemarle Street, W. 



Scale of Charges for Advertising in '^ Science Progress." 



Whole Paere 

 Half Pa^re 

 Quarter Page - 

 Eigfhth Pas:e 



Alt applications for space to be made to . 



Mr. JOHN MURRAY, 50a, Albemarle Street, W. 



or to 



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



( xtii ) 



