The SciencesTurpentine, Rosin Consumption, Traffic Signal Patented and moreBy Sylvester J. Liddy on January 1, 1931AdvertisementABOUT THE AUTHOR(S)Recent Articles by Sylvester J. LiddyTracking Down Your Trade Mark TitleForeign Patent Licensing Corporations, Vapex Mark UpheldChicken Capsules in Patent Suit, Position of Trade Mark and more