1937 Squibb Dental Cream original vintage advertisement. Presents the Mystery of Mary's Marks. Mary, a naturally bright child, was failing at school! Special disipline, extra study hours, no movies. Nothing seemed to help. Finally the family physician stepped in and turned detective and the search ended up in a dentist's X-ray room. Decay had penetrated so far into a molar that infection had set in; poisons were taxing her strength and retarding her progress. Frequently, tooth decay accompanies poor grades. Start your family on the Squibb plan today.

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