Submitted by Steve Wolff

Plate XXXVI.  General Electric Company Cluster Beacon, about 1927

Caption above reads:  In addition to the 24-in. beacons, it was found advisable in certain sections to place cluster beacons having less candlepower.  They consist of four automobile head-lamps surmounted by a top lamp as shown, and to turn at approximately 10 r.p.m.  Tests of such a beacon using 21-cp. automobile-type lamps, show that it is visible at a distance of 40 miles in good weather.