Page:The practice of typography; correct composition; a treatise on spelling, abbreviations, the compounding and division of words, the proper use of figures and nummerals by De Vinne, Theodore Low, 1828-1914.djvu/107

 Roman numerals of the capital, small-capital, or lower-case series are sometimes used to specify volumes, parts, or chapters in indexes and foot-notes. The word volume or chapter is rarely spelled out in an index or a note, or even abbreviated to vol. or ch., for it is supposed that the size, shape, and position of the numeral will distinguish it from other abbreviations, as it does in xi, 63, which is intended to express chapter xi, page 63. (See Abbreviations.) The numerals used for the paging of prefaces and introductions should be of the roman lower-case series. The lower-case and the small-capital letters I, v, x, closely resemble each other, and it is safer to make use of the lower-case letters only for the foot-notes where this treatment is possible. This is one of many reasons why small capitals should be made higher and wider than the round letters of the lower-case and be a proper intermediate between that series and the series of capitals.

When figures are used at the beginning of paragraphs, or to number verses or other subdivisions, the period is not needed after the figure. See the paragraphing of the Bible and the versification of all hymn-books.