t a glance what pages of mere
description could not make clear.

_Copies of Todd's New Astronomy will be sent, prepaid, to any address on
receipt of the price by the Publishers:_

American Book Company

NEW YORK . CINCINNATI . CHICAGO

* * * * *

A Laboratory Manual in Practical Botany

For use in Secondary Schools and for Elementary Work in Colleges

By CHARLES H. CLARK, A.M., D.Sc.,

Principal of Windsor Hall School, Waban, Mass.

Cloth, 12mo, 272 pages. Illustrated 96 cents

The course of botanical study outlined in this book is intended to give
the student a general view of the subject, and at the same time to lay a
foundation upon which more advanced studies may be built. The book is
primarily a laboratory manual and follows the method recommended by the
Committee of Ten and employed by the best teachers. So pursued, the
study of botany provides the means of developing habits of close and
accurate observation and of cultivating the reasoning powers that can
scarcely be claimed for any other subject taught in the schools.

It provides a systematic outline of classification to serve as a guide
in laboratory work and in the practical study of the life histories of
plants, their modes of reproduction, manner of life, etc. 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. 310 pages $1.25

The Same. Without Tables 1.00

Logarithmic and Trigonometric Tables (separate) 1.00

A clear analytic treatment of the elements of Plane and Spherical
Trigonometry and their practical applications to Surveying, Geodesy, and
Astronomy, with convenient and accurate "five place" tables for the use
of the student, engineer, and surveyor. Designed for High Schools,
Colleges, and Te