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Sophol: (a combination of methylennucleinic acid with silver)
Sophol: (a combination of methylennucleinic acid with silver)
Advertisement for Sophol, manufactured by Farbenfabriken of Elberfeld Co., New York. Card has two trademarks of Bayer Pharmaceutical products at both the top left and top right of the card.
Copyright:
The National Library of Medicine believes this item to be in the public domain. (More information)