Many companies are now using moving-picture films to show the technical operations involved in making up their manufactured product, or to show views in different parts of a factory. Moving-picture cameras have been used also in a very striking way by Mr. Frank B. Gilbreth as an adjunct to methods of time and motion study. By placing in the camera field with the worker a clock with a large dial and a sweeping second hand, an automatic and permanent record may be secured both of the worker's movements and the corresponding elapsed time. The statistics thus graphically recorded are immeasurably more accurate and more conclusive than any that could be secured in any other way. Possibilities for the use of moving-picture machines in educational work in schools are only beginning to be grasped by a few of the world leaders in thought. When the moving-picture machine becomes a feature of every school room the results will be astounding.

COMPARISONS INVOLVING TIME

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