facetiousness; but seriously, the great diffi¬ the tone value along the steep incline toward the culty in turning out uniformity of work lies in “ whites.” Figs. 33 and 34 are the graphic curves of Fig. 32, similar to Figs. 30 and 31. They are the woful lack of anything approaching uniform¬ ity in… … Figs. 45 and 46, half-tone gradations at various lines per inch. Fig. 45, VIII, shown in graphic curve of Fig. 46 the engraving at the top, and Fig. 46, the graphic curve of Scale VIII below and IX, 200 lines. the same.
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