1. The two curves for the sweep technique are not exact experimental curves since the beginning and end portions of the curves, where the intensity is changing at a slow rate, have been neglected owing to difficulty in selecting an absolute zero time. The neglected portions of the curves contribute approximately 6 percent more energy to the pulses.
2. Made by the Rubatex Division of Great American Industries, Inc., Bedford, Virginia.
3. Type 5201-B, manufactured by the Automatic Temperature Control Company, Inc.
4. Model S-1 with ac clutch made by the Standard Electric Time Company.