FERNS, by Campbell E. Waters, of Johns Hopkins University 8vo, pp. xi + 362. $3.00 net; by mail, $3.30.
2. Pocket Series, Identification Books—“How to Know,” brief and in portable shape.
III. FUNCTIONS OF NATURE
These books will treat of the relation of facts to causes and effects—of heredity and the relations of organism to environment. 8vo. 6⅝ × 8⅞ in.
Already publisht:
THE BIRD: ITS FORM AND FUNCTION, by C. W. Beebe, Curator of Birds in the New York Zoological Park. 8vo, 496 pp. $3.50 net; by mail, $3.80.
Arranged for:
THE INSECT: ITS FORM AND FUNCTION, by Vernon L. Kellogg, Professor in the Leland Stanford Junior University.
THE FISH: ITS FORM AND FUNCTION, by H. M. Smith, of the U. S. Bureau of Fisheries.
IV. WORKING WITH NATURE