instructor and student by concentrating attention (in Chapters II and III) on a few essentials, the rules of usage and principles of composition most commonly violated. In accordance with this plan it lays down three rules for the use of the comma, instead of a score or more, and one for the use of the semicolon, in the belief that these four rules provide for all the internal punctuation that is required by nineteen sentences out of twenty. Similarly, it gives in Chapter III only those principles of the paragraph and the sentence which are of the widest application. The book thus covers only a small portion of the field of English style. The experience of its writer has been that once past the essentials, students profit most by individual instruction based on the problems of their own work, and that each instructor has his own body of theory, which he may prefer to that offered by any textbook.

The numbers of the sections may be used as references in correcting manuscript.

The writer's colleagues in the Department of English in Cornell University have greatly helped him in the preparation of his manuscript. Mr. George McLane Wood has kindly consented to the inclusion under Rule 10 of some material from his Suggestions to Authors.

The following books are recommended for reference or further study: in connection with Chapters II and IV, F. Howard Collins, Author and Printer (Henry Frowde); Chicago University Press, Manual of Style; T. L. De Vinne, Correct Composition (The Century Company); Horace Hart, Rules for Compositors and Printers (Oxford University Press); George McLane Wood, Extracts from the Style-Book of the Government Printing Office (United States Geological Survey); in connection with Chapters III and V, The King's English (Oxford University Press); Sir Arthur Quiller-Couch, The Art of Writing (Putnam), especially the chapter, Interlude on Jargon; George McLane Wood, Suggestions to Authors (United States Geological Survey); John Lesslie Hall, English Usage (Scott, Foresman and Co.); James P. Kelley, Workmanship in Words (Little, Brown and Co.). In these will be found full discussions of many points here briefly treated and an abundant store of illustrations to supplement those given in this book.

It is an old observation that the best writers sometimes disregard the rules of rhetoric. When they do so, however, the reader will usually find in the sentence some compensating merit, attained at the cost of the violation. Unless he is certain of doing as well, he will probably do best to follow the rules. After he has learned, by their guidance, to write plain English adequate for everyday uses, let him look, for the secrets of style, to the study of the masters of literature.

II. ELEMENTARY RULES OF USAGE

1. Form the possessive singular of nouns by adding 's.

Follow this rule whatever the final consonant. Thus write,

This is the usage of the United States Government Printing Office and of the Oxford University Press.

Exceptions are the possessive of ancient proper names in -es and -is, the possessive Jesus', and such forms as for conscience' sake, for righteousness' sake. But such forms as Achilles' heel, Moses' laws, Isis' temple are commonly replaced by

The pronominal possessives hers, its, theirs, yours, and oneself have no apostrophe.

2. In a series of three or more terms with a single conjunction, use a comma after each term except the last.

Thus write,

This is also the usage of the Government Printing Office and of the Oxford University Press.

In the names of business firms the last comma is omitted, as,

3. Enclose parenthetic expressions between commas.

This rule is difficult to apply; it is frequently hard to decide whether a single word, such as however, or a brief phrase, is or is not parenthetic. If the interruption to the flow of the sentence is but slight, the writer may safely omit the commas. But whether the interruption be slight or considerable, he must never insert one comma and omit the other. Such punctuation as

or

is indefensible.

If a parenthetic expression is preceded by a conjunction, place the first comma before the conjunction, not after it.

Always to be regarded as parenthetic and to be enclosed between commas (or, at the end of the sentence, between comma and period) are the following:

(1) the year, when forming part of a date, and the day of the month, when following the day of the week:

(2) the abbreviations etc. and jr.

(3) non-restrictive relative clauses, that is, those which do not serve to identify or define the antecedent noun, and similar clauses introduced by conjunctions indicating time or place.

In this sentence the clause introduced by which does not serve to tell which of several possible audiences is meant; what audience is in question is supposed to be already known. The clause adds, parenthetically, a statement supplementing that in the main clause. The sentence is virtually a combination of two statements which might have been made independently: