JF Ptak Science Books Quick Post
The idea of bombing people from the sky was less than a decade old at the start of WWI, though the idea of aerial strategic bombing took off quickly beginning in 1914. When this image was published in Popular Mechanics in October 1917 (page 662), the bombing of London by aircraft and Zeppelin had been well established. In order to effect more efficient evacuation and coverage, and in order to be heard over the considerable amount of traffic noise in London, the warning signals for a possible attack were sounded in addition to three explosives shot into the air in 15-second intervals, after which the police were dispersed into the streets with whistles and placards, trying to warn people above the sounds of the city. It is an interesting peep into a small piece of time in a moment of possible terror.
23 October 1915 issue of The Illustrated London News:
[Source: Wiki, http://ow.ly/1Dah301guZl]
[Source: Wiki, http://ow.ly/1Dah301guZl]
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