Applied Motion Study
A Collection Method to industrial Preparedness

80 APPLIED MOTION STUDY device. The invention of a special microchro- nometer that recorded times down to the millionth of an hour, made possible simultaneous records of this microchronometer and the positions of the worker whose activity was being studied. Even the first records, though unsatisfactory in many respects, demonstrated the practicability and use- fulness of these methods of recording motions. Little by little the method was improved. An ordinary, reliable clock was placed alongside the microchronometer, in order to serve as a check upon its inaccuracy, if any occurred, and also to provide a record of the time of day that the study was made, in the resulting picture. Temperature and humidity records were included upon the pic- ture. Signs, describing the place where the in- vestigation was being made, the name of the in- vestigator and the date, were placed for an in- stant in the field, and thus became a part of the permanent record. The original white dial with black marks was subsequently changed, at the suggestion of a film reader, to a black dial with white divisions and white hands that left a clear, sharp record upon the picture, and recorded the elapsed time of each exposure. The worker and