Through the Action of Worms, with Observations on their Habits. By Charles Darwin, LL. D., F. R. S., author of "On the Origin of Species," etc., etc. With Illustrations. 12mo. Cloth, $1.50.
"Mr. Darwin's little volume on the habits and instincts of earth-worms is no less marked than the earlier or more elaborate efforts of his genius by freshness of observation, unfailing power of interpreting and correlating facts, and logical vigor in generalizing upon them. The main purpose of the work is to point out the share which worms have taken in the formation of the layer of vegetable mould which covers the whole surface of the land in every moderately humid country. All lovers of nature will unite in thanking Mr. Darwin for the new and interesting light he has thrown upon a subject so long overlooked, yet so full of interest and instruction, as the structure and the labors of the earth-worm."—Saturday Review.
Ants, Bees, and Wasps.
A Record of Observations on the Habits of the Social Hymenoptera. By Sir John Lubbock, Bart., M. P., F. R. S., etc., author of "Origin of Civilization, and the Primitive Condition of Man," etc., etc. With Colored Plates. 12mo, cloth, $2.00.
"This volume contains the record of various experiments made with ants, bees, and wasps during the last ten years, with a view to test their mental condition and powers of sense. The principal point in which Sir John's mode of experiment differs from those of Huber, Forel, McCook, and others, is that he has carefully watched and marked particular insects, and has had their nests under observation for long periods—one of his ants' nests having been under constant inspection ever since 1874. His observations are made principally upon ants because they show more power and flexibility of mind; and the value of his studies is that they belong to the department of original research."
Diseases of Memory.
An Essay in the Positive Psychology. By Th. Ribot, author of "Heredity," etc. Translated from the French by William Huntington Smith. 12mo, cloth, $1.50.
"M. Ribot reduces diseases of memory to law, and his treatise is of extraordinary interest."—Philadelphia Press.
"Not merely to scientific, but to all thinking men, this volume will prove intensely interesting."—New York Observer.
"M. Ribot has bestowed the most painstaking attention upon his theme, and numerous examples of the conditions considered greatly increase the value and interest of the volume."—Philadelphia North American.