10 SEPTEMBER 1937, Page 2

Anti-Air Raid Practice For a week (September 2oth-26th) Berlin is

to undergo a complete " black-out " from dusk to dawn. No street lights will be allowed, and all indoors light must be completely obscured. London experienced something like that during the War, but it never has since ; and one would have thought it nothing but common prudence to repeat it now for purposes of demonstration and experiment. Berlin is going much further, and will test thoroughly the whole of a complicated system of anti-air raid precautions, including the compulsory herding of most of the population into gasproof cellars. Paris, of course, has had similar dress-rehearsals, though not as yet so complete. But neither Paris nor Berlin is Europe's most vulnerable capital. That unenviable position is London's. And yet London has so far not rehearsed a precaution of any kind—not even a "black-out."

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