Electrical battery, [387]

Electro-magnetism, [413]

Electro-magnets, [414]

Electric telegraph, [415]

Equestrian feat, [185]

Equilibrium, stable and unstable, [109]

Evaporation, [286]

Evaporation, cold produced by, [326]

Expansion by heat, [274]

Expansion, exception to it, [330], [331]