The treatment is suggestive and general to adapt it to the courses of study in different schools, and to allow the teacher to follow his own ideas in selecting the work of his class.
Clark's Laboratory Manual in Practical Botany _will be sent, prepaid, to any address on receipt of the price by the Publishers:_ American Book Company NEW YORK.

CINCINNATI.

CHICAGO * * * * * Important New Books Crockett's Plane and Spherical Trigonometry By C.W.CROCKETT, C.E., Professor of Mathematics and Astronomy in Rensselaer Polytechnic Institute, Troy, New York.

With Tables.

Cloth, 8vo.