Electrodes, b. [298].

Electrolytes, b. [298].

Electro-magnetism, b. [243].

Elements (chemical), b. [309].

Elliptical polarization, b. [122], [123].

Empiric school (of medicine), b. [439].

Empyrean, a. [82].

Enneads, a. [213].

Entelechy, a. [74].

Eocene, b. [529].