the Illustrated Science and Invention Encyclopedia．9，Gear-Inductance the Illustrated Science and Invention Encyclopedia．15，Rectifier-Sextant the Illustrated Science and Invention Encyclopedia．11，Lock-Mine the Illustrated Science and Invention Encyclopedia．16，Shaver-Statics the Illustrated Science and Invention Encyclopedia．8，Fibre Optics-Gauss the Illustrated Science and Invention Encyclopedia．4，Cable-Chain Reaction the Illustrated Science and Invention Encyclopedia．2，Arches-Bell the Illustrated Science and Invention Encyclopedia．3，Bell-Cable Railways the Illustrated Science and Invention Encyclopedia．19，Typewriter-Weighing Machines the Illustrated Science and Invention Encyclopedia．13，Paper-Polaroid Camera