Show II I Visible Numbers Devised i n or to n new w uses ot of existing Instruments are with without without out end In the building Industry try An interesting application of luminous material to house numbers Is now no nobE beIng bE be- I In Ing made This Is a I r deeply In nn an plaque the upper surface being coated with Ith mark 1 enamel and baked the lower surface receiving a scratch hrush finish then Theil I the center portion Is coated with Ii a good quality of radium luminous mn inn This Is then In nn an aluminum 1 m ln frame with clear glass |