Maxim Dynamo 41 Sawyer’s Incandescent Lamp, 1878 42 Farmer’s Incandescent Lamp, 1878 42 Maxim’s Incandescent Lamp, 1878 43 Edison’s First Experimental Lamp, 1878 44 Diagram of Constant Current Series System 45 Diagram of Edison’s Multiple System, 1879 45 Edison Dynamo, 1879 46 Edison’s High Resistance Platinum Lamp, 1879 47 Edison’s High Resistance Platinum in Vacuum Lamp, 1879 47 Edison’s Carbon Lamp of October 21, 1879 48 Demonstration of Edison’s Incandescent Lighting System 49 Dynamo Room, S. S. Columbia 50 Original Socket for Incandescent Lamps 51 Wire Terminal Base Lamp, 1880 51 Original Screw Base Lamp, 1880 52 Improved Screw Base Lamp, 1881 52 Final Form of Screw Base, 1881 53 Diagram of Edison’s Three Wire System, 1881 54 Diagram of Stanley’s Alternating Current Multiple System, 1885 55 Standard Edison Lamp, 1884 56 Standard Edison Lamp, 1888 56 Standard Edison Lamp, 1894 57 Various Bases in Use, 1892 58 Thomson-Houston Socket 59 Westinghouse Socket 59 Adapters for Edison Screw Sockets, 1892 60 Various Series Bases in Use, 1892 61 Edison “Municipal” System, 1885 62 Edison “Municipal” Lamp, 1885 63 Shunt Box System, 1887 64 Enclosed Arc Lamp, 1893 65 Open Flame Arc Lamp, 1898 66 Enclosed Flame Arc Lamp, 1908 66 Constant Current Transformer, 1900 68 Series Incandescent Lamp Socket with Film Cutout, 1900 70 Nernst Lamp, 1900 71 Diagram of Nernst Lamp 72 Cooper-Hewitt Mercury Vapor Arc Lamp, 1901 73 Diagram of Cooper-Hewitt Lamp for Use on Alternating Current 74