Applied Motion Study
A Collection Method to industrial Preparedness

I CHRONOCYCLEGRAPH DEVICES 85 obtain synchronous chronocyclegraph records that are accurate, yet that differ in shape from one another to such an amount that it is possible to distinguish each, and. to trace the continuous path of each light with ease. The latest development in this study has been in the line of cheapening the cost of the appar- atus. As in making micromotion studies it was found that the original method could be much cut down in cost by using the same film as many as sixteen times, so here it was found that cheaper types of interrupters can be used in place of the more adjustable tuning fork, made orig- inally for the extremely accurate tests of the psy- chological laboratory. It must be understood that for the investigation of surgery and like types of activity, and for use in investigations in psychological laboratories, and in other scientific fields, the most expensive and elaborate of ap- paratus is none too fine; but it is possible, where first cost must be considered, and in much work in the industries, to make records accurate enough with apparatus that is within the reach of any one desiring to own it, and willing to de- vote time to learning to operate it.