THE AMERICAN SCIENCE SERIES. 3 



ASTRONOMY. BY SIMON NEWCOMB, Professor in the Johns 

 Hopkins University, and EDWARD S. HOLDEN, Director of 

 the Lick Observatory. 



Advanced Course. Large 12 mo. Pp. 512. $2.50. 



To facilitate its use by students of different grades, the sub- 

 ject-matter is divided into two classes, distinguished by the size 

 of the type. The portions in large type form a complete course 

 for the use of those who desire only such a general knowledge 

 of the subject as can be acquired without the application of ad- 

 vanced mathematics. The portions in small type comprise ad- 

 ditions for the use of those students who either desire a more 

 detailed and precise knowledge of the subject, or who intend to 

 make astronomy a special study. 



From C. A. YOUNG, Professor in Princeton College: " I conclude 

 that it is decidedly superior to anything else in the market on the 

 same subject and designed for the same purpose." 



Briefer Course. I2mo. Pp. 352. $1.40. 



Aims to furnish a tolerably complete outline of the as- 

 tronomy of to-day, in as elementary a shape as will yield satis- 

 factory returns for the learner's time and labor. It has been 

 abridged from the larger work, not by compressing the same 

 matter into less space, but by omitting the details of practical 

 astronomy, thus giving to the descriptive portions a greater 

 relative prominence. 



From THE CRITIC: "The book is in refreshing contrast to the 

 productions of the professional schoolbook-makers, who, having only 

 a superficial knowledge of the matter in hand, gather their material, 

 without sense or discrimination, from all sorts of authorities, and 

 present as the result an indigesta moles, a mass of crudities, not un- 

 mixed with errors. The student of this book may feel secure as to 

 the correctness of whatever he finds in it Facts appear as facts, and 

 theories and speculations stand for what they are, and are worth." 



From W. B. GRAVES, Master Scientific Department of Phillips 

 Academy: " I have used the Briefer Course of Astronomy during the 

 past year. It is up to the times, the points are put in a way to inter- 

 est the student, and the size of the book makes it easy to go over the 

 subject in the time allotted by our schedule." 



From HENRY LEFAVOUR, late Teacher of Astronomy, Williston Semi- 

 nary : "The impression which I formed upon first examination, that 

 it was in very many respects the best elementary text book on the 

 subject, has been confirmed by my experience with it in the class- 

 room." 



