Part 4

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