COMCAST CORPORATION
NEWS RELEASE


            COMCAST CORPORATION ANNOUNCES PARTIAL EXCHANGE OFFER FOR
                             JONES INTERCABLE, INC.

PHILADELPHIA, Aug. 9 /PRNewswire/ -- Comcast Corporation (Nasdaq: CMCSK - news,
CMCSA - news) today announced that it plans to commence an offer to exchange 1.4
shares of its Class A Special Common Stock (Nasdaq: CMCSK news) for each share
of Class A Common Stock (Nasdaq: JOINA - news) or Common Stock (Nasdaq: JOIN -
news) of Jones Intercable, Inc. (Nasdaq: JOIN - news, JOINA - news), for up to
79% of the combined number of shares of Jones Intercable Class A Common Stock
and Common Stock outstanding (subject to certain terms and conditions to be
contained in the offer documents). Based on the closing market prices of CMCSK,
JOINA and JOIN as of August 6, 1999, the exchange offer would value each share
of JOINA at $50.31, a 9.1% premium over its closing price and each share of JOIN
at $50.31, a 12.7% premium over its closing price.

This press release is neither an offer to purchase nor a solicitation of an
offer to sell securities. The exchange offer will be made only by means of a
prospectus and will not commence until the shares of Comcast Class A Special
Common Stock to be offered in the exchange offer are registered with the
Securities and Exchange Commission pursuant to an effective Registration
Statement.