The same use is shown in such sentences as,
Of the three stenographers Mary received fifteen dollars a week; Ellen, twelve; Susan, ten.
Rule 5.—The comma is used to indicate the omission of words.
Supply the necessary commas in the following:
1. The bonds will be taken over on or before October 1 1934.
2. On January 1 1913 the company had outstanding $4,000,000 of stock of the par value of one dollar a share.
3. The offices are at Salt Lake City Utah.
4. The transaction was officially conducted between the Power Bond & Share Co. New York and the Pacific Power Co. Tacoma Washington.
5. A late announcement of the Census Bureau tells us that the center of population of the United States is four and one-quarter miles south of Unionville Monroe County Indiana.
6. Many mechanical devices in common use may be traced to the patterns furnished by nature. Thus the hog suggests the plow; the butterfly the ordinary hinge; the toadstool the umbrella; the duck the ship; the fungus growth on trees the bracket.