The name of the original inventor of the system being tested was actually Francis Joseph McCarty (not McCarthy).
Oakland Tribune, June 8, 1914, page 15:
MAYORS CONVERSE OVER WIRELESS
Oakland and San Francisco Executives Surprised at Wonderful Phone.
Mayor Mott and Mayor Rolph of San Francisco failed to converse by wireless telephone as agreed this morning, as Mayor Mott arrived at the Oakland wireless station a few minutes after Mayor Rolph had left the Fairmont hotel in San Francisco. But both mayors talked over the instrument and sent their voices by wireless waves across the bay, and both expressed their surprise at the wonderful mechanism which made this possible.
The instrument is the invention of Francis Joseph McCarthy, who was killed eight years ago in a runaway accident. McCarthy's experiments were carried on for five years before his death, but have only recently been brought to perfection.
The experiment was carried on between the Fairmont hotel in San Francisco and the home of Alfred H. Cohen, 1440 Twenty-ninth avenue in Oakland. Mayor Mott talked with W. W. Hanscom, an engineer who handled the Fairmont station.
"If you can get into communication with Mr. Rolph," said Mayor Mott by wireless telephone over the bay, "I hope you will tell him that I was very sorry that I did not succeed in talking with him over this marvelous instrument. How would next Wednesday do? I shall see to it that I am on time."
The answer was spoken through the air, and then music was played in the Fairmont and listened to by Mayor Mott.
The directors of the National Wireless Telephone and Telegraph Company, over whose system the mayors talked, are Tyler Henshaw, Harry J. Knowles, John A. McNear, Joseph B. Ruegg, president and manager; D. H. Yarnell of San Francisco; George M. Davis of San Francisco, secretary.