MISCELLANEOUS
The word cent in per cent is now generally written without a period.
Etc. is preferable to &c. when used for “and others” or “and so on”; but not a few good writers use the latter for this purpose.
The terms 4to, 8vo, 12mo, etc., used to denote the sizes of books, are not abbreviations, and so do not take periods after them. Each number stands for a suppressed part of the word in which it appears.
The abbreviations i. e., e. g., vs., viz., etc., are often printed in italics. The words for which they stand are generally preferred to the abbreviations.