bundle at a time and placing a pressing-board between them; there should also be a stout plank introduced between the top board and the platen. In case the press should not hold quite as much as desired, more may be got in by unscrewing the press after it has been once screwed down. The press is finally screwed down as tight as possible. It should remain so for at least twelve hours, when it should be entirely emptied before the sheets are taken out of the boards. The sides of the piles or heaps must be kept perfectly even. In large offices, hydraulic presses are used. [Illustration: IMPROVED STANDING PRESS.] COUNTING OUT AND PUTTING AWAY SHEETS. When the sheets are taken out, the warehouseman knocks them up, and, after counting them into quires, ties them up in wrappers, marking the name of the work and signature on each bundle. Two or three sheets of each signature should be laid aside, in case the author, bookseller, or employer should want a copy of the work or a specimen of as many sheets as are finished. STANDARD SIZES OF MACHINE-MADE PAPER. (_Furnished by A. G. Elliot & Co., Philadelphia._) PRINTING PAPER. Medium inches, 19 × 24 Royal 20 × 25 Super Royal 21 × 27 Imperial 22 × 32 Royal and Half, 25 × 30 Double Medium 24 × 38 Imperial and Half 32 × 33 Double Super Royal 27 × 42 Double Imperial, 32 × 44. Other sizes kept on hand, but without technical names, are as follows:—22 × 28; 24 × 36; 25 × 39; 26 × 40; 28 × 42. WRITING PAPER. Note inches, 8 × 10 Packet Note 9 × 11½ Letter 10 × 16 Commercial Post 11 × 17 Packet Post 11½ × 18½ Foolscap 13 × 16 Flat Cap 14 × 17 Crown 15 × 19 Demy 16 × 21 Folio 17 × 22 Medium 18 × 23 Royal 19 × 24 Super Royal 20 × 28 Imperial 23 × 31 Elephant 23 × 28 Columbier 23 × 34 Atlas 26 × 33 Double Elephant 27 × 40 Antiquarian 31 × 53 [Illustration] A TABLE _For ascertaining the Number of Forms for a Book of any Size, and the Quantity of Paper necessary to print a thousand copies in any form, from Octavo to 36mo, half-sheetwise._