Stories by Geo. M. Hopkins

An Inexpensive Air Pump

The Formation and Fixation of Magnetic Curves

Polarized Light

Simple Instrument For The Examination Of Microscopic Objects

Polarized light

Apparatus for exhibiting wide angled crystals

Polarized Light.—Norremberg Doubler and the Study of Thin Films

Polarized Light

A Few Objects for the Polariscope

Simple Experiments in Polarized Light

The Cycloidotrope

Microscopical Examination of the Phenomenon of Colors of Thin Plates

The Microscope in the Mechanic Arts

Wire Apparatus for Laboratory Use

Lantern Illumination

Dynamic Electricity

The Depolarization of Electrodes

Electricity by Magnetic Induction

Simple Holtz Electrical Machine.—Curative Applications of Static Electricity

Bursting of Fly-Wheels

Tyndall's Experiment on Radiant Heat

New Telephone Transmitter

Simple Telephone Transmitter

On the Crystallization of Canada Balsam