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PAPER TESTING
99
kept in unison with the strength lever, and the elongation at the time of fracture is registered. This machine, although expensive, is acknowledged to be the best for high-class papers where the narrow strip
Fig. 16.—Leunig Paper-Testing Machine.
can be used. The Carrington machine for coarse papers takes a strip 2 inches wide and 7 inches between the clips, the strain is exerted by a weighted lever, and the reading is in pounds.
