(From the Printer's Circular.)

To cut Paper into Three or Five Parts.—Mr E. J. Ring, Government Printer at New Orleans, says: If paper is to be cut into three or five parts, the old method of figuring after measuring, compassing, and guess-work, folding, &c., can be done away with by simply rolling the paper into a scroll until the ends meet twice, which marked with the finger-nail or pencil, gives one-third. If one-fifth is desired, roll the paper till the ends meet four times.

To Obtain correct Margin.—The same printer says: In job work, when an impression is taken on the tympan, and the pressman wishes a sheet to be printed in the centre, he has only to place the right edge of his paper at the right end of the printed line on the tympan, and mark on the sheet at the left end of the same line, and fold the remainder into one-half, marking the tympan at the left edge of the sheet to be printed. This does away with mistakes and guess-work. [We think most pressmen follow this plan.—Typo.]