was assassinated."

(6) Relative clauses, if not restrictive, require commas: "The book,
which is the simplest, is often the most profound."

(7) In continued sentences each should be followed by a comma:
"Electricity lights our dwellings and streets, pulls cars, trains, drives
the engines of our mills and factories."

(8) When a verb is omitted a comma takes its place: "Lincoln was a great
statesman; Grant, a great soldier."

(9) The subject of address is followed by a comma: "John, you are a good
man."

(10) In numeration, commas are used to express periods of three figures:
"Mountains 25,000 feet high; 1,000,000 dollars."


The _Semicolon_ marks a slighter connection than the comma. It is
generally confined to separating the parts of compound sentences. It is
much used in contrasts:

(1) "Gladstone was great as a statesman; he was sublime as a man."

(2) The Semicolon is used between the parts of all compound sentences in
which the grammatical subject of the second part is different from that
of the first: "The power of England relies upon the wisdom of her
statesmen; the power of America upon the strength of her army and navy."