The first word after a colon when the colon introduces a logically complete phrase not very closely connected with what precedes.
_My conclusion is: A policy of consistent neutrality is the only proper one for the country._ _As the proverb well says: Beware the anger of a patient man._ 43.

_O_ interjection, but not _oh_ unless it begins a sentence.
In Latin sentences of exclamation, denunciation or appeal the lower-case _o_ is used.
_O tempora, o mores temporum._ 44.

The first personal pronoun _I_ wherever it occurs.
45.

Emphasized words.
_We stand for Liberty and Union._ This use should be avoided except for advertising display, or job work.
_We call attention to our Stock of Boots, Shoes, and Furnishings._ SMALL CAPITALS The use of small capitals presents its own peculiar problems to the printer.

The small capital has the form of the large capital but without its size and conspicuousness.