The Cambridge Committee on Public Safety has announced another surprise daytime practice raid, to take place next Sunday. Last week's test worked out very well all over Cambridge except in the Harvard precincts, Major Ralph W. Robart, Cambridge Chief Warden, announced early in the week.

This first test was particularly unsuccessful in the Yard because not one of the 400 Wardens was to be found during the raid, which lasted from 3 until 5 o'clock. 34 incidents occurred in the entire city, and Harvard's share of these was peculiarly neglected by those responsible, said Major Robart.

All wardens are expected to be on hand for next Sunday's drill, the time for which will be kept secret. There will be no disturbance to the public, since wardens will be notified by telephone both of the alarm and of any incidents in their districts.

A tentative suggestion has been made that all members of the ARP personnel be provided with identification cards carrying a photograph. Arm-bands are being distributed, but the Precinct Headquarters warns that wardens must carry their certificates at all times.