Scientific American Supplement. March 25, 1893. Great full cover illustrations show the new round lantern and lens mounted atop the great clock tower at St. Stephens. The lens apparatus and lantern are quite similar to those in use in the lighthouses of the day, and was used to signal members of Parliament when in session. The lighting apparatus consists of a second order dioptric apparatus with a top and bottom belt 820mm in height, and 1m 40mm in diameter.
Rotation is provided by a clockwork mechanism.
Included two fine large engraved illustrations of the lantern and apparatus. Scientific American Supplement. October 22, 1893. Superb 3 page article details the current state of lightship development, particularly in Great Britain and discusses the equipment, operation and life on board these important vessels. Also includes information on new gas operated lit buoys that have replaced some lightship stations.