This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1887 Excerpt: ...imagined, was extremely heavy. Up to this time rotary machines had printed on one side of the sheet only; and it was felt at the Times office, that until the printing-press was simplified, so as to be available for printing on both sides, by one operation, a roll of paper which would require no "laying-on," the most important results derivable from stereotyping pages had not been secured. The difficulty was to provide a press which should not only print from the reel, cut and deliver sheets separately, but which should also distribute the ink satisfactorily under the new conditions; which should have the most ample provision possible against " set-off"; which should have rollers that would not give trouble by softening or melting; and which should damp the paper before printing...