his chief business. In the volume before us he shows these
qualities in an admirable degree."--_Science._

XIV. BACTERIA AND THEIR PRODUCTS. By Dr. G. SIMS WOODHEAD.
Illustrated. Second Edition.

"An excellent summary of the present state of knowledge of the
subject."--_Lancet._

XV. EDUCATION AND HEREDITY. By J.M. GUYAU.

"It is at once a treatise on sociology, ethics, and
pedagogics. It is doubtful whether, among all the ardent
evolutionists who have had their say on the moral and the
educational question, any one has carried forward the new
doctrine so boldly to its extreme logical
consequence."--Professor SULLY in _Mind_.

XVI. THE MAN OF GENIUS. By Prof. LOMBROSO. Illustrated.

"By far the most comprehensive and fascinating collection of
facts and generalisations concerning genius which has yet been
brought together."--_Journal of Mental Science._

XVII. THE HISTORY OF THE EUROPEAN FAUNA. By R.F. SCHARFF, B.Sc, Ph.D.,
F.Z.S. Illustrated.

XVIII. PROPERTY: ITS ORIGIN AND DEVELOPMENT. By CH. LETOURNEAU,
General Secretary to the Anthropological Society, Paris, and Professor
in the School of Anthropology, Paris.

"M. Letourneau has read a great deal, and he seems to us to
have selected and interpreted his facts with considerable
judgment and learning."--_Westminster Review._

XIX. VOLCANOES, PAST AND PRESENT. By Prof. EDWARD HULL, LL.D., F.R.S.

"A very readable account of the phenomena of volcanoes and
earthquakes."--_Nature._

XX. PUBLIC HEALTH. By Dr. J.F.J. SYKES. With numerous Illustrations.

"Not by any means a mere compilation or a dry record of
details and statistics, but it takes up essential points in
evolution, environment, prophylaxis, and sanitation bearing
upon the preservation of public health."--_Lancet._

XXI. MODERN METEOROLOGY. AN ACCOUNT OF THE GROWTH AND PRESENT
CONDITION OF SOME BRANCHES OF METEOROLOGICAL SCIENCE. By FRANK WALDO,
Ph.D., Member of the German and Austrian Meteorological Societies,
etc.; late Junior Professor, Signal Service, U.S.A. With 112
Illustrations.

"The present volume is the best on the subject for general use
that we have seen."--_Daily Telegraph_ (London).

XXII. THE GERM-PLASM: A THEORY OF HEREDITY. By AUGUST WEISMANN,
Professor in the University of Freiburg-in-Breisgau. With 24
Illustrations. $2.50.

"There has been no work published since Darwin's o