+516.+ +The period is a mark of punctuation that denotes the completion
of a sentence.+
+517.+ The period is used at the close of all assertive and imperative
sentences. For example:
There is talk of peace but preparation for war.
Claim your own at any hazard.
+518.+ The period is used after all initials and all abbreviations, as
for example: E. V. Debs; T. P. O'Connor; Mr., Dr., Co., Mass., N. Y., C.
O. D., F. O. B., U. S. A., etc.
+519.+ The period is used to separate whole numbers and decimal numbers.
For example: 3.1416 9.342.
A period is used for the decimal point between dollars and cents;
as: $4.50, $2.25, $16.54, $35926.72.
It is also used to separate the various denominations of sterling money,
as: £14. 15s. 6d.
+520.+ The period is used after letters used as numerals or after
figures used to number paragraphs, notes, remarks, questions or any list
of particulars. For example:
The letters which are used to denote sub-heads in the enumeration of
rules as _a. b. c._, etc., also the numerals and letters marking
sections or sub-sections in chapters, as _Chapter 8._ _Paragraph 1._
_Rule 1._ _Page 4._ _Volume 2._ _Paragraph 3._ _P. 16._
+521.+ The period is also used after headings and titles, after dates
and signatures to letters and other documents; also at the close of the
address at the beginning of a letter, and of the name at the close of
the letter; also after the last item in the direction of an envelope or
package.