The History of Salt · Evan Marlett Boddy — chapter 12 of 23 · ~25 words · public domain
by JAMES PALFREY, M.D., M.R.C.P. Lond., Senior Obstetric Physician to, and Lecturer on Midwifery and Diseases of Women at, the London Hospital. Price 7s. 6d.
The History of Salt · The Wunder Library — complete classics, free to read, with narration.