An Electric Driving and Timing Apparatus for Microcinematography

Abstract

The apparatus described serves as an electric drive of a motion picture camera. It permits, in contradistinction to other devices for the same purpose, the independent adjustment of the exposure time and the interval between the exposures. The former can be adjusted between 0.2 and 5 sec., the latter continuously over a range of a factor 5000. Two applications of this apparatus in the field of microcinematography are described, one being the determination of the falling speed of suspended colloid particles in an ultramicroscope, the other being the recording of the growth of etch figures on crystal planes produced by electrolysis.

Significant aspects of visual aids in chemical education

“…In the field of micro-photography and projection, the recent developments have been equally amazing. Goetz and Romer, for example, have developed an apparatus suited to micro-cinematography of such things as the determination of the falling speed of suspended colloid particles in an ultramicroscope, and of the growth of etch figures on crystal planes produced by electrolysis (9). Loveland and others have developed a sixteen-millimeter camera with a beam splitter eyepiece making it possible to observe the action and the field while the picture is being made (10).…”