new to American
readers, "Causes of Belief in God," and "The Origin of Abstract
Ideas." It will also contain several studies reprinted from the
International Socialist Review. Lafargue's brilliant style makes
even the most abstract subjects delightful.

LIBRARY OF SCIENCE FOR THE WORKERS.

Modern International Socialism is directly related to modern science. It
is in a sense the evolution theory applied to the facts of society. It,
therefore, follows that for a full understanding of socialism some
general knowledge of the facts of modern science is necessary.

A new series of books has lately appeared in Germany which give in
simple and popular form complete proofs of the evolution theory along
with a clear account of the latest applications of this theory in the
various fields of modern science. We have arranged to translate and
publish some of the best of these, along with such original works in the
same line as are available. They are uniform in size with the Standard
Socialist Series.

1. +The Evolution of Man.+ By Wilhelm Boelsche. Translated by Ernest
Untermann. Cloth, 50 cents.

"The Evolution of Man" tells in full detail, in a clear, simple
style, illustrated by pictures, just how the descent of man can be
traced back through monkeys, marsupials, amphibians, fishes, worms
and lower forms of life, down to the animals composed each of a
single cell. Moreover, it proves that there is no such fixed line
as was formerly thought to exist between the organic and the
inorganic, but that the same life-force molds the crystal that
molds the cell. It is not only simple; it is up-to-date and gives
the latest discoveries in science. It is _the_ book on the subject.

2. +Germs of Mind in Plants.+ By R. H. France. Translated by A. M. Simons.
Cloth, illustrated, 50 cents.

A cardinal point in the philosophical systems favored by the ruling
classes is that the mind of man is something unique in the
universe, governed by laws of its own that have no particular
connection with physical laws. Modern science has proved that not
only animals, but also plants, receive impressions from the outside
world and use the data thus obtained to modify their movements for
their own advantage, exactly as human beings do. These facts are
told in this book in so charming and entertaining a style that the
reader is ca