Tuesday, August 10, 2010

Hating CMS, cont'd

Once again, the Chicago Manual of Style (15th edition, rule 9.10) is a tad less than definitive, this time on the treatment of very large numbers.

"A figure of 4.5 billion years is often given as the age of the solar system.
They were speaking in the order of 25 billion (or twenty-five billion)."