Newcomb's Elements of Astronomy 



By SIMON NEWCOMB, Ph.D., LL.D. 



Late Professor of Mathematics and Astronomy, Johns Hopkins University; 



formerly Senior Professor of Mathematics, United States Navy, and 



Superintendent of the American Ephemeris and Nautical 



Almanac, x^jj-gj. 



Cloth, 12mo, 240 pages. Illustrated .... Price, $1.00 



• This volume has been prepared for use in High Schools and College 

 Preparatory Schools. Though written especially for pupils in these 

 schools it will be found useful in schools and institutions of still higher 

 grade and as a foundation for more extended study by the private student. 



In the preparation of this new text-book on Astronomy, its dis- 

 tinguished author has kept in view two objects. One was to condense 

 the facts and laws of the science, which are most interesting and im- 

 portant, within such a compass as not to make a very serious addition 

 to the curriculum of the high school or college. The other was so to 

 present the subject that as little formal mathematics as possible should 

 be necessary in its study. 



He has constantly kept in mind the inquiring student seeking to 

 know something of the heavenly bodies and of such important subjects 

 as the principles on which our system of standard time is based; the 

 relation between the hour of the day and the longitudes of places; the 

 origin and construction of our calendar; the causes of the changing 

 seasons; eclipses of the sun and moon; the phenomena of the planetary 

 motions; the aspects of the principal constellations; and the wonderful 

 astronomical discoveries of our time. 



The work embodies and applies the results of the latest researches 

 and discoveries in astronomical science combined with the best peda- 

 gogical methods of teaching the subject. The plan of treatment is clear 

 and comprehensible, and as far as possible, objective, — that is, based 

 upon the conceptions of the pupil acquired by actual observation of the 

 phenomena of the heavens, to which his attention is constantly directed 

 throughout the book. 



It is confidently believed that the author has, in the preparation of 

 the Elements of Astronomy, made a text-book simple and lucid enough 

 to be comprehended by any one who has mastered the elements of arith- 

 metic and the most rudimental principles of geometry. The book will 

 be found, therefore, sufficiently elementary to meet the requirements of 

 the ordinary high school, while at the same time it is full and complete 

 enough for advanced classes. 



Copies sent^ prepaid^ to any address on receipt of price, 



American Book Company 



New York ♦ Cincirinati ♦ Chicago 



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