Page:Handbook of style in use at the Riverside press, Cambridge, Massachusetts (IA handbookofstylei00riverich).pdf/18

 Do not abbreviate Railroad (or Railway), Mount, or Fort. Print: Boston & Maine Railroad; Mount Everest; Fort Warren.

Points of the Compass. Abbreviate compass directions, with period; as, E., W., N., S.; and use capitals close up for compound terms, as, S.E., N.N.W., etc. These forms, of course, are used only in nautical or geographical matter, not in ordinary text.

Print the symbolic letters I O U without full points.

MS.=manuscript (noun) is to be used in the printing of bibliographical details, but not when used adjectively. Print the plural form MSS.

Print P.S. for postscript or postscriptum; S.S. for steamship.

Print X-rays; and ME. and OE. in philological works for Middle English and Old English.

Print references to plays as follows:— 2 Henry VI,, ii, 14.

Do not separate abbreviations like ', e.g., i.e., ', M.D., Ph.D., Litt.D., etc.

In text matter where a number of subdivisions are made, as, (1), (2), (a), (b), etc., do not end a line with the divisional mark, but carry it over with the matter to which it belongs.

Time and Date. Abbreviate ' and ', ' and ', and set in small caps without space between letters. Where roman letters are used, in text or footnotes, to express dates, use small caps.

Signs and Symbols. Algebraic quantities are expressed by italic letters, lower-case.

Geometrical diagrams are usually lettered in italic capitals, though roman capitals are sometimes used. Where practicable, in text references to the diagram, the style of letter used should match that used in the diagram.

Chemical symbols are always set in plain roman caps and lowercase.

The abbreviations for the various thermometers and hydrometers are set in roman as follows:—

Metric System. The abbreviations for the metric system are set in roman lower-case without space between letters:—

English Money. In indicating English money, use the forms £2 6s. 4d.; or 2l. 6s. 4d. Note that the abbreviations for pounds,