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 Technical Institutions.

Raymond’s Plane Surveying

By W.G.  RAYMOND, C.E., Member American Society of Civil
Engineers, Professor of Geodesy, Road Engineering, and Topographical
Drawing in Rensselaer Polytechnic Institute.

Cloth, 8vo. 485 pages.  With Tables and Illustrations $3.00

A modern text-book for the study and practice of Land, Topographical, Hydrographical, and Mine Surveying.  Special attention is given to such practical subjects as system in office work, to labor-saving devices, to cooerdinate methods, and to the explanation of difficulties encountered by young surveyors.  The appendix contains a large number of original problems, and a full set of tables for class and field work.

Todd’s New Astronomy

By DAVID P. TODD, M.A., Ph.D., Professor of Astronomy and
Director of the Observatory, Amherst College.

Cloth, 12mo. 500 pages.  Illustrated $1.30

A new Astronomy designed for classes pursuing the study in High Schools, Academies, and other Preparatory Schools.  The treatment throughout is simple, clear, scientific, and deeply interesting.  The illustrations include sketches from the author’s laboratory and expeditions, and numerous reproductions from astronomical photographs.

Copies of the above books will be sent, prepaid, to any address on receipt of the price by the Publishers:

American Book Company

  NEW YORK .  CINCINNATI .  CHICAGO