The American Science Series. 3 
Newcomb & Holden’s Astronomy. ApvancepD Course. 
By Simon NEwcoms, Professor in the Johns Hopkins University, and 
Ene S. Hoxtpen, Director of the Lick Observatory. xii-+ 512 pp. 
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 advanced 
mathematics. The portions in small type comprise additions 
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. A college text-book. 
Newcomb & Holden’s Astronomy. Brizrer Course. 
x+366 pp. i2mo. 
Aims to furnish a tolerably complete outline of the as- 
tronomy of to-day, in as elementary shape as will yield 
satisfactory 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, 
Chamberlin & Salisbury’s Text-books of Geology. 
ADVANCED CoursE and BRIEFER COURSE. 
By Tuomas C. CHAMBERLIN, Head Professor in the University of 
Chicago, and RoLLin D. SaLisBury, Professor in the University of 
Chicago. [Jz preparation.] 
The general scope and character of these works may be 
inferred from the corresponding “Courses”? upon other sub- 
jects in the series. A well-balanced treatise, planned for 
college work and suited in one edition to higher, and in the 
other to lower-class men, thoroughly modern in matter and 
method, leading naturally to independent research, and dis- 
tinctively American in its selection of illustrative facts,—such 
a treatise may be confidently expected. Special pains will be 
bestowed upon the pictorial illustrations. 
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