~ W. J. Gage & Co., 1911-1912(click to enlarge)Germ-Proof Slates: “Each slate is put through a special process which leaves it free from any danger of infection in future, and makes it completely Germ-proof.”

~ W. J. Gage & Co., 1911-1912
(click to enlarge)

Germ-Proof Slates: “Each slate is put through a special process which leaves it free from any danger of infection in future, and makes it completely Germ-proof.”