I. Electrical Conductivity of Gases in a normal state.
II. Properties of a Gas when in the conducting state.
III. Mathematical Theory of the Conduction of Electricity through a Gas containing Ions.
IV. Effect produced by a Magnetic Field on the Motion of the Ions.
V. Determination of the Ratio of the Charge to the Mass of an Ion.
VI. Determination of the Charge carried by the Negative Ion.
VII. On some Physical Properties of Gaseous Ions.
VIII. Ionisation by Incandescent Solids.
IX. Ionisation in Gases from Flames.
X. Ionisation by Light. Photo-Electric Effects.