John McCullough designed a lamp in which With a waterway complete from the Great Lakes to have been mounted in a single lamp. These were either of the double filaments could be thrown into New Orleans, and with the completion of the Panama under the control of a commutating switch arranged circuit… … THE "TURN-DOWN" ELECTRIC LAMP. MAP AND PROFILE OF THE CHICAGO-ST. LOUIS WATERWAY, ments made in the incandescent lamp business up BY A. FREDERICK COLLINS. An incandescent light has the advantage over to this time, with several additional features to burn either filament alone, both in parallel, or…
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