United States. Surgeon-General's Office, American Roentgen Ray Society · New York : Middleditch · leaf 101
israther unusual to find really poor plates unless they havebeen misused after purchase. They should be kept whereit is cool and dry, and entirely protected from bothheat, light and both direct and scattered X-rays. Fast Work. From what has gone before, it is clear that the sameradiographic density… … Fig. 49. Relation of target position to shadows and their overlapping.
