National Geographic : 1943 Oct
"IT OUGHT TO GET A WAR MEDAL" THIS little tube can't help you smell. But it can help you talk, see and hear. Right now, it helps direct guns, planes, ships. It ought to get a war medal. It has given birth to a new art called Electronics. In 1912, in the Bell Laboratories, Dr. H. D. Arnold made the first effective high-vacuum tube for amplifying electric currents. Vacuum tubes made possible the first trans oceanic telephone talk by the Bell System in 1915. Vacuum tubes are now used on practically all Long Distance circuits to reinforce the human voice. That's why you can talk across the continent so easily. Over 1,250,000 electronic tubes are in service in the Bell System. Bell Laboratories developed them, Western Electric made them. But are and find and both Laboratories and Western Electric busy now with war - turning out tubes putting them to work in many a device to and destroy the enemy on land, in the air, under the sea. After the war, this Bell System army of tubes will work in thousands of ways for peace. BELL TELEPHONE SYSTEM 4 HELP THE WAR BY MAKING ONLY VITAL CALLS TO WAR-BUSY CENTERS. THAT'S MORE AND MORE ESSENTIAL EVERY DAY.