“We struck the idea of making a stencil of the paper by pricking with a pen & then rubbing over with an ink,” Edison wrote in his notebook on 30 June 1875.
“We struck the idea of making a stencil of the paper by pricking with a pen & then rubbing over with an ink,” Edison wrote in his notebook on 30 June 1875.
“We struck the idea of making a stencil of the paper by pricking with a pen & then rubbing over with an ink,” Edison wrote in his notebook on 30 June 1875.