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Pages 147-148

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From page 147...
... PHOTOGRAPHIC RECORDS Both a 16 mm motion picture camera and a motor driven, 35 nnn, single lens, reflex camera provided time-lapse coverage of expected areas of distress during the tests. The motion picture camera was a Bolex H-I6 Rex h with an 86 EE Vario Switar lens.
From page 148...
... Conrposites were made before, during, and after each test. Before and after each test, cracks were marked on the f l a t black celling with white chalk.

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