Cloth, 12mo, $1.50 net; School Library Edition, 50 cents net

“When two writers of marked ability in both literature and natural history unite to produce a work giving scope to their special talents, the public has reason to expect a masterpiece of its kind. In the ‘Citizen Bird,’ by Mabel O. Wright and Dr. Elliott Coues, this expectation is realized—seldom is the plan of a book so admirably conceived, and in every detail so excellently fulfilled.”—The Dial.

“There is no other book in existence so well fitted for arousing and directing the interest that all children feel toward the birds.”—Tribune, Chicago.

Flowers and Ferns In their Haunts

By MABEL OSGOOD WRIGHT

New Edition, cloth, 12mo, $2.00 net

The subjects are treated in their relation to landscape—the whole bound together with a thread of narrative. The book thus has the fascination of romance, yet no better handbook could be found for the study of the flowers in their natural surroundings. There are over 50 full-page plates of the flowers where they live and grow, along the roadside, in wood or by river. In addition to these plates, there are over 100 illustrations in the text, made direct from photographs by the author and by J. H. McFarland.

A Text-book on the Principles of Animal Histology

By ULRIC DAHLGREN, M.S., Assistant Professor of Biology in Princeton University; and WILLIAM A. KEPNER, A.B., Adjunct Professor of Biology in the University of Virginia

Cloth, 515 pp., 8vo, $3.75 net