THE SEMICOLON
The semicolon is used to denote a degree of separation greater than that indicated by the comma, but less than that indicated by the colon. It prevents the repetition of the comma and keeps apart the more important members of the sentence. The semicolon is generally used in long sentences, but may sometimes be properly used in short ones.
Rules for the Use of the Semicolon
1. When the members of a compound sentence are complex or contain commas.
Franklin, like many others, was a printer; but, unlike the others, he was student, statesman, and publicist as well.
With ten per cent of this flour the bread acquired a slight flavor of rye; fifteen per cent gave it a dark color; a further addition made the baked crumb very hard.
The meeting was composed of representatives from the following districts: Newton, 4 delegates, 2 substitutes; Dorchester, 6 delegates, 3 substitutes; Quincy, 8 delegates, 4 substitutes; Brookline, 10 delegates, 5 substitutes.
2. When the members of a compound sentence contain statements distinct, but not sufficiently distinct to be thrown into separate sentences.
Sit thou a patient looker-on;
Judge not the play before the play be done;