Journal of the Society of Motion Picture Engineers (1930-1949)

Oct., 1944 FAST MOTION ANALYSIS 297 kinds of performance, and of course, it does not enter into the interpretation, which may be found to require a longer time than performing the experiment. It appears that the best arrangement for carrying on such an activity is to have it done by people experienced in developmental engineering, so that the evidence, when revealed, will be quickly evaluated with regard to the project, and that adjustment of subsequent procedure may be made with a view to further development of the technique employed. Furthermore, there are other factors to be considered with regard to the introduction of a high-speed photographic activity. The ac TotU use Successful xi Ti success fu.1. FIG. 5. tual amount of use expected to be given to the photographic device employed in this activity can be gathered from the curves of Fig. 5. At first, the novelty of the device and the fact that some applications may be long-standing will provoke a high level of use, represented by the solid line. Then it will be used many times where useful results will not be obtained, represented by the space between the solid and dotted lines. Finally, the ultimate use of the camera, after the novelty has worn off and the long-standing applications have been tried, will settle down to the level of the dot-and-dash line. Thus, in starting a high-speed photographic activity, one must not expect the device used to maintain the high level of its initial employment. Returning again to Table 1, there is portrayed opposite "Results" the condition where further changes in the device are necessary to get