Journal of the Society of Motion Picture Engineers (1930-1949)

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WATER SPACE Fig. 1. Views of the cylinder head, showing the location of the quartz window and the general shape of the combustion chamber; left, plan of the ceiling of the combustion chamber; right, longitudinal section of the cylinder head. RLM DRUM FILM DRUM DRIVE PRESSURE INDICATOR END OF WINDOW RETAINER Fig. 2. The first combustion camera mounted upon the engine. F. W. Bowditch: Research Photography 473