FLAME SPEED AND SPARK INTENSITY. … FIG. e.-Showing at "1" and "2" the apparent irabeddLng of Fig. T.-Showmg detonation of C2 and Os mixtures as the image of the igniting spark in the blunt tip of the wedge mdicated by the blunt records, record; and at "2" and "4" the dark space between the spark image and the flame record.
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