Page:Cowie's Printer's pocket-book and manual.djvu/29

Rh the stick. Thus, for example, if five lines make seven, the progression of five is ten, fifteen, twenty, &c. and the progression of seven will be fourteen, twenty-one, twenty-eight, &c.

"In counting off copy after this manner, we take notice of the breaks; and where we judge that one will drive out, we intimate it by a mark of this &ang; or this [ shape; and again, where we find that a break will get in, we invert the mark ⦢ or thus ]. And to render these marks conspicuous to the compositor, we write them in the margin, that he may take timely notice of, and keep his matter accordingly.

"We also take care to make proper allowance for heads to chapters, sections, paragraphs, &c. and mention in the margin what depth of lines is left for each, in case their matter varies in quantity.

"In examining the state of the copy, we must observe whether it has abbreviations, that we may guard against them in casting off, and allow for them according to the extent of the respective words, when written out at length."

The following is a plan for calculating the amount of the composition of a sheet in twelves. The page must be measured from the head-line to the signature inclusive; the width measured, and invariably doubled.