Removed duplicated word "the" on page 40: "the great Calabrian
Earthquake."
Page 89 refers to the "Fossa del Vetrano;" elsewhere there are
references to "Fossa della Vetrana," which may be what was intended.
However, I did not change this.
Changed "hydrochloride" to "hydrochloric" on page 109: "the hydrochloric
acid which it discharged."