NOTE

"This is emphatically a "new century" book. It aims at stimulating
progress along lines carefully marked out as immediately practicable.
The same author's "History of Astronomy" is a survey of the past;
"Problems in Astrophysics" looks to the future. What we already know is
regarded in it as means to the end of augmenting knowledge. Astrophysics
is a science still at the outset of a magnificent career. Its ways are
beset with claimants for its attention. There is often much difficulty
in choosing between them, yet rapidity of progress depends upon prudence
in selection. Many hints for its guidance are accordingly offered in the
present work, which deals, so far as possible, with answerable
questions. It should, then, find its way into the hands of every
astronomer who desires to keep up with the drift of thought, and to be
informed of the prospects of work and discovery in the various
departments of research connected with the physics of the heavenly
bodies."

*SOME PRESS OPINIONS*

"The book shows every sign of profound and careful study, and the sense
of scientific imagination, which is one of the greatest means of
independent discovery."--_St. James's Gazette._

"The book is written with all the charm that has characterised the
authoress's previous volumes, and contains a wealth of information and
suggestion for work yet to be accomplished which will appeal to all who
are interested in the problems of the universe."--_Daily Telegraph._

"We feel that Miss Clerke has earned, and will surely receive, the
admiration and gratitude of astronomers for this new proof of her
devotion to their science."--_The Times._

MODERN COSMOGONIES

Crown 8vo. Bound in Cloth.

Price 3s. 6d. net

(Post free, price 3s. 10d.)

NOTE

This volume contains a series of brief and attractive studies on current
theories regarding the origin and history of the visible universe. The
difficulties besetting cosmical doctrines of evolution are pointed out
in them, and the expedients are described by which those difficulties
have been met, though not wholly overcome. The widened possibilities
connected with the new science of radiology, the unification of the
physical forces that may ensue upon further discoveries concerning
electrical action, the function in the world of the impa