Armstrong and Norton’s Laboratory Manual of Chemistry By JAMES E. ARMSTRONG and JAMES H. NORTON.  Cloth, 12mo, 144 pages 50 cents A brief course of experiments in chemistry, covering about forty weeks’ work in the laboratory.

Cooley’s Laboratory Studies in Chemistry By LEROY C. COOLEY, Ph.D.  Cloth, 8vo, 144 pages 50 cents A carefully selected series of 151 experiments, designed to teach the fundamental facts and principles of chemistry for secondary schools.

Keiser’s Laboratory Work in Chemistry By EDWARD H. KEISER, Ph.D.  Cloth, 12mo, 119 pages 50 cents A series of experiments in general inorganic chemistry, intended to illustrate and supplement the work of the class-room.

Qualitative Chemical Analysis of Inorganic Substances As practiced in Georgetown College, D.C.  Cloth, 4to, 61 pages $1.50 Designed to serve as both text-book and laboratory manual in Qualitative Analysis.

Copies of any 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

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Physics

Cooley’s Student’s Manual of Physics For the Study Room and Laboratory.  By L.C.  COOLEY, Ph.D., Professor of Mathematics in Vassar College.  Cloth, 12mo, 448 pages.  Illustrated $1.00 A new text-book in Physics for high schools, academies, and colleges.  It embodies a full and thorough treatment of the laws of physics, the best methods in science teaching, the latest discoveries and applications in physics, and a full course in laboratory practice.  Special care has been taken to select experiments which will not overtax the capacities of beginners nor require expensive apparatus, but which at the same time will call for systematic and original work and lead to accurate results.

Harrington’s Physics for Grammar Schools BY C.L.  HARRINGTON, M.A.  Cloth, 12mo, 123 pages. 50 cents A practical text-book based on the natural or experimental method, elementary enough for pupils in grammar schools, and affording a thorough preparation for advanced study.

Appletons’ School Physics Cloth, 12mo, 552 pages $1.20 A thoroughly modern text-book on Natural Philosophy, which reflects the most advanced pedagogical methods and the latest laboratory practice.

Steele’s Popular Physics By J. DORMAN STEELE, Ph.D.  Cloth, 12mo, 392 pages $1.00 A popular text-book, in which the principles of the science are presented in such an attractive manner as to awaken and fix the attention of every pupil.

Trowbridge’s New Physics By JOHN