......................................... FIGS. 107 and 108.—Two Types of Handles. .......................... FIG. 109.—Induction or Spark Coil. ................................ FIG. 110.—The Primary and Core. ................................... FIG. 111.—The Secondary Winding. .................................. FIG. 112.—The Fixed Condenser. .................................... FIG. 113.—Details of the Wooden Coil Heads. ....................... FIG. 114.—Details of the Wooden Base. ............................. FIG. 115.—Details of the Interrupter. The Spring and Standard for the One inch coil should be made one-quarter of an inch longer. ... FIG. 116.—The tube. ............................................... FIG. 117.—The Bridge. ............................................. FIG. 118.—Section of the Spark Coil showing the arrangement of the Parts. ............................................................ FIG. 119.—End View of the Complete Coil. .......................... FIG. 120.—Side View of the Completed Coil. ........................ FIG. 121.—Diagram of Connections. ................................. FIG. 122.—Perspective view of Coil showing names of the various parts. ............................................................ FIG. 123—Front view of the Field Casting. ......................... FIG. 124.—Side elevation of the Field Casting. .................... FIG. 125.—Details of the Armature. ................................ FIG. 126.—The Commutator. ......................................... FIG. 127.—The Armature and Commutator Assembled on the Shaft ready for winding. ...................................................... FIG. 128.—Details of the Wooden Base. ............................. FIG. 129.—Details of the Bearings. ................................ FIG. 130.—The Pulley. ............................................. FIG. 131.—The Brushes. ............................................ FIG. 132.—The Completed Dynamo. ................................... FIG. 133.—The completed Electric Motor. ........................... FIG. 134.—Details of the Field Frame. ............................. FIG. 135.—The Assembled Field ready for Winding. .................. FIG. 136.—Details of the Armature Lamination. ..................... FIG. 137.—The Armature assembled on the Shaft ready to Wind. ...... FIG. 138.—The Commutator. ......................................... FIG. 139.—Diagram showing how the Armature Coils are connected to the Commutator Sections. .......................................... FIG. 140.—The Bearings. ........................................... FIG. 141.—The Brushes. ............................................ FIG. 142.—The Fibre Block for supporting each Brush. .............. FIG. 143.—Completed Electric Engine. .............................. FIG.