London, June 18.
Arrangements made for warnings in the event of air raids are detailed in an Air Raid Precautions Memorandum issued by the Home Office yesterday.
For the purpose of the scheme the country is divided into more than 100 separate warning districts, and it is proposed that warning messages should be distributed to each of these districts as it became threatened in the progress of a raid, Messages would be distributed oves General Post Office telephones to individuals named in prearranged lists. When it appears possible that a certain district or districts may be raided, a preliminary caution message is to be sent to the principal officers of local services and to those responsible for blast furnaces, explosives factories and other industries where fairly lengthy preparations must be made.
The preliminary caution message would be entirely confidential in character in order to avoid unnecessary public alarm and dislocation of industrial activity if-the -air raid should not materialize. If the threat of attack were removed, the preliminary caution message would be washed out by a cancel caution message, and the public would know nothing about it.
Text read from the printed page and cleaned; old type leaves the occasional error.