Chapter II: Classification of Nature

=1. Library Series=, very full descriptions. 8vo. 7-1/2x10-1/4
in.

Already publisht: = NORTH AMERICAN TREES=, by N. L. BRITTON,
Director of the New York Botanical Garden. $7.00 net; carriage
extra.

=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.