Applied Motion Study
A Collection Method to industrial Preparedness

122 APPLIED MOTION STUDY It remains but to show the relation of the mo- tion model to the chronocyclegraph, the use of the motion model for teaching, and for comparing the results of various methods of teaching. The mo- tion models are made by observing the chronocy- clegraph through the stereoscope, and bending a wire until it coincides with the path of the motion observed. The chronocyclegraph is best made in combination with the penetrating screen, that enables the motion model maker to measure, and thus to transfer to his wire very small elements of the motion path. The motion model maker is provided with a cross-sectioned background against which he can hold his model during the construction period, to compare his results with the cyclegraph from which he is working. He is also provided with a cross-sectioned box in which he may place the model, for observation and analysis. As the original cyclegraph, by means of the penetrating screen method, may be in- closed in a box of as many sides as are desired, it is often possible to facilitate the making of the model by the use of a properly cross-sectioned box. This box is of wood painted black, with the cross-sectioning done in white. The motion