By Professor A. E. Dolbear
——
THE TELEPHONE
With directions for making a Speaking Telephone
Illustrated 50 cents
THE ART OF PROJECTING
A Manual of Experimentation in Physics, Chemistry, and Natural History, with the Porte Lumière and Magic Lantern
New Edition Revised Illustrated $2.00
MATTER, ETHER, AND MOTION
The Factors and Relations of Physical Science
Illustrated $1.75
——
Lee and Shepard Publishers Boston