=Study Questions.= _1._ What books could Edison read at twelve? _2._ Tell of his thousand newspapers. _3._ What were the cause and the effect of his first lessons in telegraphy? _4._ What was his first great invention? _5._ What did he find in Wall Street, New York? _6._ How much did Edison think of asking for his invention? _7._ How much was offered him? _8._ Tell the story of the work in Edison's shop at Newark, New Jersey, _9._ Why did he want a great library at Menlo Park? _10._ How does sound travel? _11._ What was the trouble with Edison's first phonograph? _12._ Name some of the uses of the phonograph. _13._ Make a list of Edison's great inventions. _14._ Tell how the first moving pictures came to be made? _15._ How did the machine Edison invented differ from a real moving picture machine? _16._ Who invented the first complete moving picture machine? _17._ How important is the moving picture business? _18._ Tell some incidents of the war which you saw in moving pictures. _19._ Does your school use a moving picture machine in its classroom work? _20._ How are lessons studied when moving pictures are used? _21._ Where can schools get their films? _22._ Name two other uses for moving pictures. _23._ What earlier invention resembled the typewriter? _24._ Name one simple thing the lack of which kept men from inventing a typewriter sooner. _25._ Describe Sholes' first typewriter. _26._ From what invention did the dictaphone come? _27._ How is dictating done by means of the dictaphone? _28._ What difficulty held back the progress of the automobile? _29._ Name two ways in which this has been overcome. _30._ How old is the automobile business? _31._ How does the United States compare with other countries in number of automobiles used? _32._ How did auto trucks keep the Germans from capturing Paris? _33._ What is a Zeppelin or dirigible? _34._ Tell about the studies of the Wright brothers. _35._ What progress had others made before the Wright brothers succeeded? _36._ What was unusual about Wilbur Wright's flight in 1903? _37._ What is a monoplane? a biplane? a hydroplane? an airship? _38._ Name some peace-time and war-time uses of airplanes. _39._ Tell the story of Holland's inventions. _40._ What are the uses of the submarine? _41._ Name the first submarine to cross the Atlantic. =Suggested Readings.= THOMAS A. EDISON: Mowry, _American Inventions and Inventors_, 85-89; Dickson, _Life and Inventions of Edison_, 4-153, 280-388. CHRISTOPHER L. SHOLES: Hubert, _Inventors_, 161-163. THE AUTOMOBILE: Doubleday, _Stories of Inventors_, 69-84; Forman, _Stories of Useful Inventions_, 161-163. WILBUR AND ORVILLE WRIGHT: Wade, _The Light Bringers_, 112-141; Delacombe, _The Boys' Book of Airships_; Simonds, _All about Airships_; Holland, _Historic Inventions_, 273-295.