Page:Paper and Its Uses.djvu/164

148 To find the Quantity of Paper required for an Edition of a Book of a Given Size.—An edition of a book of 400 pages demy octavo, 6,500 pagescopies? [sic], is required. What quantity of double demy should be issued in perfect reams? A sheet of double demy will contain 32 pages; a ream will produce 500 copies.

To Calculate the Weight of a Ream Containing a Larger or Smaller Number of Sheets.—Multiply the weight by the factor given below, or else add or subtract the fraction representing the difference in the number of sheets.