Use figures for numbered streets and avenues above 99th; spell out below 100th: 123 Twenty-third avenue, 10 East 126th street.
Use figures in statistical or tabular matter; never use ditto marks.
Use figures, period, and en quad for first, second, etc.: 1.—, 2.—.
Do not begin a sentence or paragraph with figures; supply a word if necessary or spell out: At 10 o'clock; Over 300 men.
Do not use the apostrophe to form plurals of figures: the 4s, rather than the 4's.
In all texts from the Bible set the chapters in Roman numerals and the verses in figures: Matt. xxii. 37-40; I. John v. 1-15. In Sunday school lessons say Verse 5.
Say three-quarters of 1 per cent.; not 3/4 of 1 per cent.
Set tenths, hundreds, etc., in decimals: 1.1; 2.03.
11. Abbreviations:
Abbreviate the following titles and no others, when they precede a name: Rev., Dr., Mme., Mlle., Mr., Mrs., Mgr. (Monsignore), M. (Monsieur).
Do not put Mr. before a name when the Christian
name is given except in society news and
editorials: Mr. Johnson; but Samuel L. Johnson.
Supply Mr. in all cases when Rev. is used without
the Christian name: Rev. Henry W. Beecher;
but Rev. Mr. Beecher.
Never use "Honorable" or the abbreviation
thereof except with foreign names, in editorials,
or in documents.