time of securing until zero hour, with a variation of one volt. Frequency for the same time was constant except for normal instantaneous variation of plus and minus 0.1 cycles. The load was 105 kw until it increased to 115 kw at minus 32 minutes and to 125 kw at minus 17 minutes, The station operated normally until zero hour, Evidently a short circuit occurred in the power house transformer bank at plus 0.7 seconds, preventing the stop signal at plus 15 seconds from reaching the generators, The No, 3 engine stopped at plus 16 minutes, and the No, 2 engine continued to run until plus 2 hours and 14 minutes, Figures 5,15-7 through 5,15-12 indicate the kilowatt hours gener- ated by each plant, Figures 5,15-13 through 5.15-16 show the kilowatt demand values for Parry Island for the high day, the low day, average Sunday, and average work day in March 1951. 5-219