Heyl's pictures were on glass plates fixed in the circumference of a wheel, and each was brought and held for a part of a second before the lens.

This method was obviously too slow and too expensive.

Edison with his keen mind approached the difficulty and after a prolonged series of experiments arrived at the decision that a continuous tape-like film would be necessary.

He invented the first practical "taking" camera and evoked the enthusiastic cooperation of George Eastman in the production of this tape-like film, and the modern motion picture was born.

The projecting machine was substantially like the "taking" camera and was so used.