Contents

05 March 1965
Vol 147, Issue 3662

About The Cover

The flash of a single biluminescent cell. The dinoflagellate Noctiluca miliaris, stimulated electrically in total darkness by five brief pulses 15 milli-seconds apart. produced a summated flash. Photography of the image was made possible by use of a five-stage image intensifier; an accelerating voltage of 36 kv amplified the intensity of the image approximately 900,000 times (X 270). See page 1140. [G. T. Reynolds, R. Eckert, and R. D. Allen]