Spacing ought to be even. Paragraphs are not to be widely spaced for the sake of making breaklines. When the last line but one of a paragraph is widely spaced and the first line of the next paragraph is more than thick-spaced, extra spaces should be used between the words in the intermediate breakline. Such spaces should not exceed en quads, nor be increased if by so doing the line would be driven full out.
In general, close spacing is to be preferred; but this must be regulated proportionately to the manner in which a work is leaded.
Breaklines should consist of more than five letters, except in narrow measures. But take care that bad spacing is not thereby necessitated.
Poetical quotations, and poetry generally when in wide measure, should be spaced with en quadrats. But this must not be applied to reprints of sixteenth and seventeenth century books: in such cases a thick space only should be used.
Avoid (especially in full measures) printing at the ends of lines—a, l., ll., p.orpp., I (when a pronoun).
Capt., Dr., Esq., Mr., Rev., St., and so on, should not be separated from names; nor should initials be divided: e.g. Mr.W. E. |Gladstone;notMr. W. |E. Gladstone.
Thin spaces before apostrophes, e.g. that’s (for ‘that is’), boy’s (for ‘boy is’), to distinguish abbreviations from the possessive case.
In Greek, Latin, and Italian, when a vowel is omitted at the end of a word (denotedby an apostrophe), put a space before the word which immediately follows.
Hair spaces to be placed between lower-case contractions, as in e.g., i.e., q.v.
Indentation of first lines of paragraphs should be one em for full measures in 8vo and smaller books. In 4to and larger books the indentation should be increased.
Sub-indentation should be proportionate; and the rule for all indentation is not to drive too far in.
Quotations in prose, as a rule, should not be broken off from the text unless the matter exceeds three lines.
Use great care in spacing out a page, and let it not be too open.
Underlines, wherever possible, to be in one line.