EDUCATIONAL PROGRESS. 



The educational demands of the age are extending to new fields. Modern research in 

 the realms of Science and Nature is revealing studies of the most intense interest, from 

 which are growing new modes of mental culture and new educational processes. 



Among the most interesting and valuable accompaniments for the teacher, in har- 

 mony with this irresistible advance of scientific thought, are several recent educational 

 publications of D. APPLETON & CO., New York. The subjects treated are 



THE NATURAL SCIENCES, 



including Natural Philosophy, Botany, Astronomy, Chemistry, Physiology, etc., 

 Geography, Drawing, Ancient and Modern Languages, etc. 



Among the newest works of especial excellence are 



THE POPULAR SCIENCE MONTHLY, 



YOUMANS'S BOTANIES, 



SCIENCE PRIMERS, 

 DESCHANEL'S NATURAL PHILOSOPHY, 



CORNELL'S PHYSICAL GEOGRAPHIES, 



KRUSI'S INVENTIVE DRAWING, 



AND MANY OTHERS. 



Teachers are particularly invited to address the publishers, stating upon which sub- 

 jects they are desiring new or improved text-books for class introduction, and their 

 communications will receive full and prompt attention. 



A new Educational Catalogue, just published, and printed in the most attractive 

 manner, will be mailed free to educators, on application. Also, the Educational Record 

 for 1873. Address 



D. APPLETON & CO., Publishers, 549 & 551 Broadway, N. T. 



NOW BEADY. 



THE MOON: 



HER MOTIONS, ASPECT, SCENERY, AND PHYSICAL CONDITION. 



By RICHARD A. PROCTOR, B. A., Cambridge, 



HONORARY SECRETARY OP THE ROYAL ASTRONOMICAL SOCIETY ; AUTHOR OF "THE SUN," "SATURN 



M U , 



AND ITS SYSTEM, 



" OTHER WORLDS THAN OURS," ETC., ETC. 



With Three Lunar Photographs by ButJierford, enlarged by Brothers ; Map of the Moon 

 from the Mappa Selenographica of Beer and Mcidler ; arid Chart of the Moon on 

 the Stereographic Projection. 



1 vol. CrowD, 8vc. 394 pages. Cloth. Price, $5.00. 



" I have adopted a much more complete and exact system of illustration in dealing with the 

 Moon's motions than either of my predecessors in the explanation of this subject. I attach great 

 importance to this feature of my explanation, experience having satisfied me not only that such 

 matters should he very freely illustrated, but that the illustrations should aim at correctness of 

 detail, and (wherever practicable) of scale also. 



" Some features, as the advance of the perigee and the retreat of the nodes, have, I believe, 

 never before been illustrated at all. 



"The table of lunar elements will be found more complete than that usually given. In fact, in 

 this table, and throughout the work, my aim has been to help the student of the subject by supply- 

 ing information not given, or not so completely given, elsewhere. It has always seemed to me that, 

 although in works on scientific subjects much of what is written must be common property and 

 many facts must be compiled from the writings of other authors, the main purpose of the writer 

 should be to present results which he has himself worked out and which are calculated to be of use 

 to others." From Author's Preface. 



D. APPLETON & CO., Publishers. 



