Chapter III: ELECTRICITY, MAGNETISM, ETC.--Electric Launches.--A

paper read before the Society of Arts by A. RECKENZAUN, and
discussion on the same.--Advantages of electromotive power.--
Cost of same.--Experimental electric launches

First Experiments with the Electric Light.--Sir Humphry
Davy's experiments in 1813,--With two engravings

Electrical Grapnel for Submarine Cables and Torpedo Lines.--
3 figures

Hughes' New Magnetic Balance.--1 figure

Apparatus for Measuring Small Resistances.--With engraving
and diagram

Terrestrial Magnetism.--Magnetism on railways.--Synchronous
Seismology