D. APPLETON & CO.'S PUBLICATIONS. 
^HE SUN. By C. A. Young, Ph. D., LL. D., Pro- 
■*■ fessor of Astronomy in Princeton University. New and re- 
vised edition, with numerous Illustrations. i2mo. Cloth, 
$2.00. 
" In this book we see a master's hand. Professor Young has no superiors, if he has 
ffivals, among astronomers in this country. . . . ' The Sun ' is a book of facts and 
achievements, and not a discussion of theories, and it will be read and appreciated by 
all scientific students, and not by them alone. Being written in un technical language, 
it is equally adapted to a large class of educated readers not engaged in scientific pur- 
suits." — Journal of Education, Boston. 
" Professor Young's work is essentially a record of facts and achievements, rather 
than of theories and attempts at the interpretation of mysteries ; yet the great ques- 
tions still remaining to be answered are of course discussed, and in a masterly man- 
ner." — Philadelphia Evening Bulletin. 
"It is one of the best books of popular science ever written, and deserves a host of 
readers." — The Dial, Chicago. 
"You feel throughout that a master is leading you amid the intricacies and mazes 
of one of the most absorbing of studies. . . . Many a one whose views are hazy and 
dim will find here just that enlightenment, without an overburdened technicality, that 
will prove most useful." — The Interior. 
nritE STORY OF THE SUN. By Sir Robert S. 
•*■ Ball, F.R. S., author of "An Atlas of Astronomy," " The 
Cause of an Ice Age," etc. 8vo. Cloth, $5.00. 
"Sir Robert Ball has the happy gift of making abstruse problems intelligible to the 
' wayfaring man ' by the aid of simple language and a few diagrams. Science moves 
so fast that there was room for a volume which should enlighten the general reader on 
the present state of knowledge about solar phenomena, and that place the present 
treatise admirably fills." — London Chronicle. 
"As a specimen of the publisher's art it is superb. It is printed on paper which 
entices the reader to make marginal notes of reference to other books in his library, 
the type is large, the binding is excellent, and the volume is neither too large nor 
too small to handle without fatigue." — New York Herald. 
A 
N ATLAS OF ASTRONOMY. By Sir Robert 
S. Ball, F. R. S., Professor of Astronomy and Geometry at the 
University of Cambridge ; author of " Starland," " The Cause 
of an Ice Age," etc. With 72 Plates, Explanatory Text, and 
Complete Index. Small 4to. Cloth, $4.00. 
" The high reputation of Sir Robert Ball as a writer on astronomy at once popular 
and scientific is in itself more than sufficient recommendation of his newly published 
* Atlas of Astronomy.' The plates are clear and well arranged, and those of them which 
represent the more striking aspects of the more important heavenly bodies are very 
beautifully executed. The introduction is written with Sir Robert Ball's well-known 
lucidity and simplicity of exposition, and altogether the Atlas is admirably adapted to 
meet the needs and smooth the difficulties of young and inexperienced students of 
astronomy, as well as materially to assist the researches of those that are more advanced." 
■^London Times. 
New York : D. APPLETON & CO., 72 Fifth Avenue. 
