iTHE


 EXPIRIMENTAZL SCIENCE SERIES.


 In neat 12mo volumes, bound in cloth, fully
 illustrated. Price per volume, $1.00.


A Tins series of scientific books fbr boys, sria, and students of every age,
 was designed by Prof. Alfred M. Mayer, Ph.D., of the Stevens Institute
 of Technology, oboken. New Jersey. Every book is addressed directly
 to the young student, and he is taught to construct his own apparatus out
 of the cheapest and most common materials to be found. Should the
 reader make all the apparatus described in the first book of this series, he
 will spend only $12.40.

 NOW READY:

 I.-LIGHT:
 A Series of Simple, Entertaining, and Inexpensive Experiments in the Phe-
 nomena of Light, or Students of every Age.
 By ALFRED M. MAY B and CHARLES BABNARD.

 II.-SOUND:
 A Aedes of Simple, Entertaining, and Inexpensive Experiments in the Pe-
 nomena of Bound, for the Use of Students ot every Age.
 By ALPFRD MA'RHALL MA YER,
 Professor of Physics In the Stevens Institute of Technology; Member of
 the National Academy of Selences; of the American Philoeophical
 Society, Philadelphia; of the American Academy of Arts and
 Sciences, Boston; of the New York Academy of .81-
 ences; of the German Astronomimal Society; of
 the American Otologcal Society; and Hon.
 rary Member of the New York
 Ophthalmologlal Society.

 IN AonIa PXUPARAWowe
 hI. Vision and the Nature of Light. *
 IV. Electricity and Magnetism.
 V. Heat.
 VI. Meohanios.
 VII. Chemistry.
 VIII. The Art of experimenting with Cheap and Sim.
 ple Instruments.
 Z APPLETON & d0., PuAkW e, 49 6 551 Broadway, N. F