A documentary titled 'Building for Service' in the United States. In 1878 there were fewer telephones in the United States as compared to later years. Alexander Graham Bell, the inventor of the telephone, in his forecast to the Electric Telephone Company writes that telephone cables could be laid underground or suspended overhead connecting with wires to buildings of any kind. A man could speak to another man at a distant place by this means. A graph showing the growth of the Bell System in the number of telephones, from 2 million in 1876 to 16 million in 1926. Thousands of people have worked in streets and on mountains in laying telephone facility, to bring the inventor's forecast to reality. A graph showing physical property of the Bell System from year 1911 through 1925.
Aerial view of Chicago, Illinois. Aerial view of buildings and skyline in Chicago. Aerial view of Boston Store building and North American building in Chicago. Smoke arises from the buildings. Curtiss Amphibian flying boat in low fly-by to right.
U.S. Mark VIII tank on a hill side at Camp Meade in Maryland, USA. Demolition charge placed on the tank is detonated. Explosion on the tank. Soldiers examine the damage created by the explosions.
Charges placed on a tank detonated for testing purpose at Camp Meade in Maryland, USA. Soldiers examine the extent of damage done to the tank.
Charges placed on British tank and American Mark VIII tanks detonated at Camp Meade in Maryland for testing purpose. Soldiers then examine the extent of damage done to the tanks.
Glimpses of airplanes and crews that made the Pan American Goodwill flight that covered 22,000 miles to 21 Central and South American nations, in 1926. Aerial view of hangars and runway at kelly Air Base, Texas, as one of the five Loening OA-1 Amphibious aircraft takes off from the runway on Dec. 21, 1926.The five aircraft seen in flight over a city, are: The New York, with crew: Maj. Herbert Dargue and Lt. Ennis Whitehead; The San Antonio with crew: Capt. Arthur McDaniel and Lt. Charles Robinson; The San Francisco with crew: Capt. Ira Eaker and Lt. Muir Fairchild; The Detroit, with crew: Capt. Clinton Woolsey and Lt. John Benton; and The St. Louis, with crew: Lt. Bernard Thompson and Lt. Leonard Weddington. President Coolidge presenting the pilots with with citations for the Distinguished Flying Cross at Bolling Field, Washington, D.C., on May 2, 1927, at the opening of the Pan American Air Commission Conference.