Fig 1. Whell revolving at such a rate as to show a luminous circle about the fixed light, as a center/ The arms to be made of gas pip, to combine strength and lightness, & properly braced. The wheel to revolve on a frame work constructed near the fixed light; and in a plane at right angles to the line of approach. To be actuated by an electric motor.
Fig. 2.Light: Incandescent (or oil lamp, or gimbals) oscillating slowly thro’ ab arc of 160”. It would be absolutely possible to confound such a light, with any other now in use. Clockwork or electric motor, or steam power