Apparatus for the Study of Human Cells—some Improvements

An electronic light source and modified Bolex H‐16 camera for time‐lapse cinemicrography

“…The standard Lucas parts are shown inside the dashed box. The apparatus is energized by the clock unit described by Dawson et al (1964).…”

“…The authors have for some time been designing and using apparatus for timelapse cinemicrography of living human cells in culture (Dawson, 1963;Dawson et al, 1964;Dawson et a]., 1966a). Their successive designs have been based on Zeiss inverted phase-contrast microscopes and 16 mm Bolex cameras.…”

A time‐lapse cinemicroscope for cell biology*

“…The resulting reading is correlated by test strip and graph to the required output of electronic flash. The exposure meter described by Dawson, Dryden, and Mathews (1964) involving a photo-transistor and an oscilloscope with a long-persistence phosphor can be used.…”