the Illustrated Science and Invention Encyclopedia．17，Statistics-Teleprinter and Telex the Illustrated Science and Invention Encyclopedia．15，Rectifier-Sextant the Illustrated Science and Invention Encyclopedia．18，Telescope-Typewriter the Illustrated Science and Invention Encyclopedia．21，Historic Inventions-Index the Illustrated Science and Invention Encyclopedia．19，Typewriter-Weighing Machines the Illustrated Science and Invention Encyclopedia．12，Mining Techniques-Pantograph the Illustrated Science and Invention Encyclopedia．13，Paper-Polaroid Camera the Illustrated Science and Invention Encyclopedia．16，Shaver-Statics the Illustrated Science and Invention Encyclopedia．6，Cultivator-Dynamometer the Illustrated Science and Invention Encyclopedia．7，Earthmoving Machinery-Fibre