National Geographic : 1917 Jul
Being An Alarmist about your health does not help. It's much more to the point to have D I OXOGEN handy; one of its best uses is as a mouth wash-one tea spoonful in a little water. Most diseases originate in the mouth, and they don't get started in a clean mouth. Washing the mouth is as important a health measure as brushing the teeth. THE OAKLAND CHEMICAL Co. 10 ASTOR PLACE, N. Y. A *PwEPTUL, buifFe RDOldlTExdi ' OAK'AND CHEMI(A~ "Mention the Geographic-It identifies you.'