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