from extensive tests, within the guaranteed 0.2 volts, It was also ascertained from the test that there was no perceptible time lag between sending and recording voltage fluctuations and that satisfactory recordings could be obtained over loaded 19 gauge telephone pairs ap- proximately 20 miles in length. Comparison of the telemetered record charts obtained by E G & G during the test periods with the record charts obtained from the power plant and control station recording instruments showed that the telemetering units functioned perfectly, This meant that it was possible to monitor voltages at the remote plants from the control station on Parry up to zero hour so that if the generating units shut down or the power system on the experiment islands failed from any cause an indication would have been shown on the control board and the firing delayed, A standard procedure was developed for preparing the power plants at the test sites for actual test operating conditions, Prior to the tests, complete mechanical and electrical test runs were made at each power plant, A report of the tests made on Runit is presented as an exhibit at the end of this volume, For the first experiment at Runit, the plant was readied for test according to the established procedure, except that only two of the three 118 kw units were operated, A check of the load was made and it was found to be between 70 and 75 kw. As this load was less than the capacity of one generator, it appeared that complete assurance of continuous power supply would be available if two units were running, This load condition was called to the attention of the Chief of the Firing Party, and after discussion by him with the Commander TG 3,1, it was decided to run two units instead of three, The standard procedure was to seal the building approximately four hours prior to test time, as designated above, with air for combustion being supplied through the one air intake remaining in operation, At 0815 on D-Day, Holmes & Narver was advised that the engines on Runit were still running, which indicated failure some place in the engine shutdown system, As soon as air transportation could be arranged, an engineer was sent to Runit. The doors of the plant were opened but because of heavy fumes it was impossible to enter, Since the engines were still running, the fuel oil drain valve was opened to permit the oil to drain from the tank, This stopped engine No. 1, but engine No. 3 continued to run for an additional 30 minutes, Inspections of the plant were later made and the conclusions drawn from the inspections were as follows: 1, The ground shock which followed the test caused the generator oil circuit breakers to open and deenergize the timing circuit used to shut down the engines, 2, The engines continued to run at reduced speed and at no load because of insufficient oxygen, At the time the doors were opened, the increased supply of air allowed the engine speed 5-217