With Illustrations, 12mo.

Cloth, $1.50.
"Professor Le Conte has long been known as an original investigator in this department; all that he gives us is treated with a master hand.
It is pleasant to find an American book that can rank with the very best of foreign books on this subject."-_The Nation._ * * * * * A STUDY IN PSYCHOLOGY.
Genius and Degeneration.
By Dr.WILLIAM HIRSCH.

With a Preface by Prof.Dr.E.Mendel.
Translated from the second edition of the German work.

Large 8vo, uniform with Nordau's "Degeneration." Cloth, $3.50.
Dr.Hirsch's acute and suggestive study of modern tendencies was begun before "Degeneration" was published, with the purpose of presenting entirely opposite deductions and conclusions.

The appearance of Dr.
Nordau's famous book, with its criticisms upon Dr.Hirsch's position, enabled the latter to extend the scope of his work, which becomes a scientific answer to Dr.Nordau, although this was not his specific purpose originally.