Homoiomeria, a. [78].
Horizon, a. [131].
Horoscope, a. [222].
Horror of a vacuum, a. [346].
Houses (in Astrology), a. [222].
Hydracids, b. [283].
Hygrometer, b. [177].
Hygrometry, b. [138].
Hypostatical principles, b. [262].
Iatro-chemists, b. [263].