Applied Motion Study
A Collection Method to industrial Preparedness

FOR'THE CRIPPLED SOLDIER 151 cannot be represented only by a perspective pic- ture, although perspective pictures are very val- uable in shop practice. F. Zur Nedden: A few weeks ago Mr. Gil- breth showed me a novel improvement of his method, giving the means for taking motion studies in the tri-dimensional way. For this pur- pose, Mr. Gilbreth first photographs a tri-dimen- sional net of white lights, he then removes the net, places the workman in position, and makes mo- tion studies. By this way he can conceive, espe- cially if he makes photographs stereoscopically, exactly the place every motion in space occurs. This would meet the objection raised by Mr. Hanau. H. E. Resseler gave an instance of a mechan- ical device made recently in one of our hospitals in New York City. A young girl had a form of tetanus and by removing the muscles of the lower jawbone, and making a device with a spring, to be wound up just like one would wind up a clock, fastening it to the jaw and running it over the head, the jaw was kept in constant motion. After about three weeks the device was taken off. It was surprising to note how the muscles of the