Changed "hydrochloride" to "hydrochloric" on page 109: "the hydrochloric acid which it discharged."
Changed "disk" to "disc" on page 126: "the disc and index."
Changed "azismuths" to "azimuths" on page 143: "the different azimuths."
Changed "silicious" to "siliceous" on page 143: "filled with siliceous sand."