- From the 1st to the 92d Congress.
- Their children were in 1st, 2d, 3d, and 10th grades.
- We read the 8th and 12th chapters.
but The district comprised the first and second precincts.
- He represented the first, third, and fourth regions.
- The report was the sixth in a series of 14.
Ordinals and numerals appearing in a sentence are treated according to the separate rules dealing with ordinals and numerals standing alone or in a group. (See rules 12.4, 12.5, and 12.24.)
- The fourth group contained three items.
- The fourth group contained 12 items.
- The 8th and 10th groups contained three and four items, respectively.
- The eighth and ninth groups contained 9 and 12 items, respectively.
Beginning with 10th, figures are used in text matter for numbered streets, avenues, etc. However, figures are used at all times and street, avenue, etc. are abbreviated in sidenotes, tables, leaderwork, and footnotes to tables and leaderwork.
- First Street NW.; also in parentheses: (Fifth Street) (13th Street); 810 West 12th Street; North First Street; 1021 121st Street; 2031 18th Street North; 711 Fifth Avenue; 518 10th Avenue; 51-35 61st Avenue
The comma is used in a number containing four or more digits, except in serial numbers, common and decimal fractions, astronomical and military time, and kilocycles and meters of not more than four figures pertaining to radio.
In chemical formulas full-sized figures are used before the symbol or group of symbols to which they relate, and inferior figures are used after the symbol.
6PbS·(Ag,Cu)₂S·2As₂S₃O₄
