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.