Antique Bus Trolley Cardboard Advertising Sign Cabot's Sylpho Nathol Medicine. Measures 11" x 21" and is a genuine advertising sign used in streetcars, bus & subway train cars. This one was used in The Boston Elevated Street Railway. Guaranteed an authentic genuine 1930 era sign. Small chip top left corner, otherwise fine with normal age related wear - see my detailed photos.
Cabot's Sylpho-Nathol was antiseptic and disinfectant.
Sylpho Nathol was used for years before the start of the Spanish Flu to fight infantile paralysis and polio. During the Spanish Flu, it was marketed as the best product to kill the virus.
an ad for Sylpho-Nathol, published in The Boston Post on November 20, 1918, advertised the “germ killer” as the best precaution: “Today you must use every precaution to eliminate all sources of infection.”