Sandusky Star-Journal, January 5, 1929, page 3:

Columbia  Celebrates  Speedy  Rise
CBS national map

NEW YORK, Jan. 5--The high spot appearing in the spread of the Pacific and the gulf coasts may, in the minds of some, be the prolonged "gala" program that has been prepared for this event on the night of Jan. 8. But the real high spot, to those back of the scenes who have watched the progress of this national network, is the remarkable arise of this system from a chain of 15 stations only 15 months ago to a network of nearly 50 today. This and the National Broadcasting Company with its various divisions give the entire United States and adjoining territories "full coverage" of programs such as only New York can provide.
    The extent to which the Columbia System has expanded is revealed in a booklet issued to prospective radio advertisers. Here it is noted that from a small chain confined to 15 stations in the northeast, furnishing only 10 hours of entertainment a week, the system has grown to one of 49 stations spread over the whole United States, broadcasting more than 21 hours a week and promising further expansion in this direction.
Buys  WABC  as  "Key"
    At the same time this expanded network is inaugurated, it is announced that the Columbia System has bought station WABC in New York and is preparing to build a new highpower transmitter from which the entire new network will operate. WABC at present is part time "key" station for the Columbia System, sharing its programs with WOR. After September, 1929, all programs will emanate from the new WABC studios and high power transmitters.
    In addition the United Independent Broadcasters, which owns and operates the Columbia System, loses its identity in the change of official name to the Columbia Broadcasting System. William S. Paley, president of the United Independent Broadcasters, remains in the same capacity as head of the new Columbia System, while Major J. Andrew White, who has been managing the affairs of the old Columbia System as its president, becomes managing director of the new outfit.
    The old network of the Columbia System remains the "basic network" of the new group. This consists of 27 stations in practically the same area which the original system covered. Here, according to the company's announcement, there is a population of 60,000,000, including a potential radio audience of 27,500,000.
South  Well  Represented
    Three new southern groups are to be added to this basic network. The first group includes the stations in Richmond, Norfolk and Asheville, serving a 5,000,000 population in the states of Virginia, North and South Carolina, Tennessee, Kentucky and part of West Virginia.
    The second southern group takes in Nashville, Chattanooga, Birmingham and Memphis, including more than 7,000,000 inhabitants in their territory. The third group in the south is rather southwestern, as the states of Arkansas, Oklahoma and Texas are represented with stations in Hot Springs, Oklahoma City, Wichita, Dallas, Fort Worth and San Antonio. Here is another 7,000,000 population to be covered by this addition.
    The fourth group to be added to the Columbia System is that of the far west and the Pacific coast. The stations in Los Angeles, San Francisco, Portland, Seattle and Spokane have already been linked to the eastern network for an hour every Sunday evening for the last three months. Now Denver and Salt Lake City are added and all will get the full time benefits planned by the new administration.
    The far west area covers a potential audience of about 7,000,000 persons, say the Columbia System officials.
90  Per  Cent.  Coverage
    In addition to these groups there are the supplementary stations in Minneapolis-St. Paul, Milwaukee and New Orleans which will take the programs of the new system. These broadcasters, it is estimated, have a combined potential radio audience of about 4,000,000 listeners.
    The effectiveness with which the new Columbia Broadcasting System will cover the country is brought out in the following statement in the booklet issued by it:
    "In the territory blanketed by these stations, 87 per cent. of the population of the United States is concentrated. Ninety per cent. of all manufactured products and 79 per cent. of all farm products are produced in this territory. Ninety-one per cent. of the country's purchasing power is located here.
    "With three exceptions, every city of 150,000 and over in the United States is covered by this network."