LIST OF ILLUSTRATIONS
| PAGE | |
| Portion of the Electrical Exhibit in the United States National Museum | viii |
| Otto Von Guericke’s Electric Machine, 1650 | 2 |
| Voltaic Pile, 1799 | 4 |
| Faraday’s Dynamo, 1831 | 8 |
| Pixii’s Dynamo, 1832 | 9 |
| Daniell’s Cell, 1836 | 10 |
| Grove’s Cell, 1838 | 11 |
| Grove’s Incandescent Lamp, 1840 | 13 |
| De Moleyns’ Incandescent Lamp, 1841 | 14 |
| Wright’s Arc Lamp, 1845 | 15 |
| Archereau’s Arc Lamp, 1848 | 16 |
| Starr’s Incandescent Lamp, 1845 | 18 |
| Staite’s Incandescent Lamp, 1848 | 19 |
| Roberts’ Incandescent Lamp, 1852 | 19 |
| Farmer’s Incandescent Lamp, 1859 | 20 |
| Roberts’ Arc Lamp, 1852 | 21 |
| Slater and Watson’s Arc Lamp, 1852 | 21 |
| Diagram of “Differential” Method of Control of an Arc Lamp | 22 |
| Lacassagne and Thiers’ Differentially Controlled Arc Lamp, 1856 | 23 |
| Serrin’s Arc Lamp, 1857 | 24 |
| Siemens’ Dynamo, 1856 | 25 |
| Alliance Dynamo, 1862 | 26 |
| Wheatstone’s Self-Excited Dynamo, 1866 | 27 |
| Gramme’s Dynamo, 1871 | 28 |
| Gramme’s “Ring” Armature | 28 |
| Alteneck’s Dynamo with “Drum” Wound Armature, 1872 | 29 |
| Lodyguine’s Incandescent Lamp, 1872 | 30 |
| Konn’s Incandescent Lamp, 1875 | 30 |
| Bouliguine’s Incandescent Lamp, 1876 | 31 |
| Jablochkoff “Candle,” 1876 | 32 |
| Jablochkoff’s Alternating Current Dynamo, 1876 | 33 |
| Wallace-Farmer Arc Lamp, 1875 | 34 |
| Wallace-Farmer Dynamo, 1875 | 34 |
| Weston’s Arc Lamp, 1876 | 35 |
| Brush’s Dynamo, 1877 | 36 |
| Diagram of Brush Armature | 36 |
| Brush’s Arc Lamp, 1877 | 37 |
| Thomson-Houston Arc Dynamo, 1878 | 38 |
| Diagram of T-H Arc Lighting System | 39 |
| Thomson-Houston Arc Lamp, 1878 | 40 |
| Thomson Double Carbon Arc Lamp | 40 |
| 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 |
| Luminous or Magnetite Arc Lamp, 1902 | 75 |
| Diagram of Series Magnetite Arc Lamp | 76 |
| Mercury Arc Rectifier Tube for Series Magnetite Arc Circuits, 1902 | 77 |
| Early Mercury Arc Rectifier Installation | 78 |
| The Moore Tube Light, 1904 | 79 |
| Diagram of Feeder Valve of Moore Tube | 80 |
| Osmium Lamp, 1905 | 82 |
| Gem Lamp, 1905 | 83 |
| Tantalum Lamp, 1906 | 84 |
| Tungsten Lamp, 1907 | 86 |
| Drawn Tungsten Wire Lamp, 1911 | 87 |
| Quartz Mercury Vapor Lamp, 1912 | 88 |
| Gas Filled Tungsten Lamp, 1913 | 89 |
| Gas Filled Tungsten Lamp, 1923 | 90 |
| Standard Tungsten Lamps, 1923 | 92 |
Portion of the Electrical Exhibit in the United States National Museum.
Section devoted to the historical development of the electric light and dynamo.