Fig. 1—Plan View of the Original Otto Slide-Valve Engine
Fig. 2—The Otto Gas Engine
Fig. 3—Otto Gas Engine and Dynamo for House Lighting
Fig. 4—Otto Gas Engine and Pump Combined
Fig. 5—Fielding’s Gas Engine
Fig. 6—Fielding’s Gas Engine, Side Elevation
Fig. 7—Fielding’s Gas Engine, Plan View
Fig. 8— The Day Gas Engine
Fig. 9— The Day Gas Engine, Front Sectional View
Fig. 10— The Day Gas Engine, Side Sectional View
Fig. 11—The Griffin Oil Engine, Front ¾ View
Fig. 12—The Griffin Oil Engine, Rear ¾ View