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It is then washed with a solution of sulphate of iron. Every light spot in the camera-picture becomes dark on the sensitive coating of the glass-plate.
By combining their individual intelligences they succeed in coping with adverse circumstances, even quite unforeseen and unusual, like those bees of the Paris Exhibition which fastened with their resinous propolis the shutter to a glass-plate fitted in the wall of their hive.
"Two hundred and fifty yards over," came through the telephone, and on the glass-plate of the distance-register, faintly illuminated by an electric lamp, appeared the number 2550. "2550 yards!" repeated the lieutenant to the captain of the left gun, giving the angle of direction himself. The Connecticut again heaved over to port, and the thunder of cannon rolled over the waves of the Pacific.
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