Abstract :
An aerial Hash unit, whose peak light output is so intense that only three would be needed to light up Yankee Stadium, has been developed by a scientific instrument firm. The light source of the unit, developed for night aerial photography, is a xenon-charged flash tube 3.5 cm high (about 1 &1/3; inches) and the diameter of a pencil. The flash tube is made of high-purity quartz and is shaped like the looped end of a safety pin.
