King Calls Out All Army, Navy, Air ReservesftLondon, April 8.—King George placed England on a war footing this afternoon to meet the general strike ofthe Triple Alliance, threat-*ened for Tuesday unless the Government has reopened • negotiations with the miners by that time. The King eall-' out army, navy and air reserves and issued an appeal for a citizens1 emergency force, as well as for recruits♦for active service, to be en-‘ listed for a period of 90