Science Source ftp Apr 2015

EN_01170126_1241
Science Source ftp Apr 2015
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The Trench Signaling lamp was in a wooden case and was battery operated. It had a bulls eye lens to concentrate the light and had a morse key to switch the lamp on and off. It was used mainly for local use from trench to trench and operators would receive the message through a periscope or telescope. It was always extremely dangerous to transmit towards the front of the battlefield as this would attract enemy rifle fire. No date or location available.
2015-04-07
East News
Science Source
Photo Researchers
BZ7866
1,69MB
33cm x 23cm by 300dpi
1, 20TH, A, ALLIED, ALWAYS, AND, ARMED, ARMY, AS, ATTRACT, AVAILABLE, BATTERY, BATTLE, BATTLEFIELD, BULLS, BW, CASE, CENTURY, CONCENTRATE, DANGEROUS, DATE, ENEMY, EVENT, EXTREMELY, EYE, FAMOUS, FIRE, FIRST, FOR, FORCES, FROM, FRONT, GLOBAL, GREAT, HAD, HISTORIC, HISTORICAL, HISTORY, I, IMPORTANT, IN, IT, KEY, LAMP, LENS, LIGHT, LOCAL, LOCATION, MAINLY, MESSAGE, MILITARY, MORSE, NO, NOTABLE, OF, OFF, ON, ONE, OPERATED, OPERATORS, OR, PERISCOPE, PHOTOGRAPH, RECEIVE, RESEARCHERS, RIFLE, SIGNALING, SWITCH, TELESCOPE, THE, THIS, THROUGH, TO, TOWARDS, TRANSMIT, TRENCH, USE, USED, WAR, WARFARE, WAS, WELL-KNOWN, WESTERN, WOODEN, WORLD, WOULD, WW1, WWI,