Air Raid Test

Shortly after eight o'clock last evening a new system of air raid warnings was tested in Cambridge. The method of alerting has been changed slightly in order to insure a standardized system for the Eastern Seaboard region.

Under the new system, the preliminary warning will be announced by a continuous blast of the siren for two minutes. When the raiders are nearly overhead, an intermittent sounding of the siren will be given. Finally, the all clear signal will be broadcast by telephone or by whatever method the individual community deems best.