1. The Senator [Davis] may strongly condemn the measure, but I shall vote for it. [Applause.]

As the above example is quoted matter, the two interpolated words take brackets.

2. [a—b—(c—d)].

In the above algebraic expression brackets and parentheses are used conventionally to group the letters (algebraic symbols) which they respectively enclose.

3. Indeed an exceedingly giftPeer

[To himself]

Indeed an exceedingly gifted man;
Almost all he says is beyond comprehension.

[Looks around.]

4. Let every one of us please his neighbor for his good to edification.—Romans xv, 2.