Evening Republican, Volume 21, Number 235, Rensselaer, Jasper County, 19 October 1917 — Silver Plate Periscopes. [ARTICLE]

Silver Plate Periscopes.

New York. —Silver plating the periscopes of their TTboafs is the latest invisibility promoting device of the Germans. It was stated by officers of an American liner just arrived at an Atlantic port. Covering the periscopes with a coating of silver renders them practically invisible.