Guard Against Air Attacks.

New York Times 100 years ago today, February 2, 1913:
British Arsenals Reconstructed to Resist Aerial Bombs.
    LONDON, Jan. 20.— The magazines of the Admiralty throughout the United Kingdom are being reconstructed, so that they will no longer be such good targets for bombs dropped from aeroplanes. The first change has been made at Portsmouth, where the heretofore familiar low brick and stone buildings have been replaced by semi-subterranean stores. These stores have been constructed of ferro-concrete, the roofs being covered with three or four feet of earth, and turfed over to make each magazine an insignificant object from above. The site selected is on one of the upper reaches of the harbor, which can only be reached by small craft, the explosives being taken direct from them into the magazines. Both the land and water frontages are under constant watch by the police, who at night have the assistance of trained dogs.
    The Admiralty has also given instructions, for a great increase in the oil fuel, storage at Portsmouth, which goes to confirm the reports that all the new British battleships and cruisers are to burn that fuel. There are already rows of great oil tanks at Forton, near Portsmouth, and their number is to be largely increased. New piers for unloading tank steamers and loading the largest warships are also under construction.