SIMPLE, ENTERTAINING, AND INEXPENSIVE EXPERI- FOR THE USE OF STUDENTS OF EVERY AGE. BY ALFRED MARSHALL MAYER, Professor of Physics in the Stevens Institute of Technology. Member of the German Astronomical Society; of the American Otological Society; and Honorary Member of the New York Ophthalmological Society. NEW YORK: D. APPLETON AND COMPANY, 1, 3, AND 5 BOND STREET. 1886. |