The orignal scan of this article is at: https://chroniclingamerica.loc.gov/lccn/sn85066387/1910-07-06/ed-1/seq-2/
The San Francisco Call, July 6, 1910, page 2:
"YANKEE DOODLE" SUNG BY WIRELESS
_____
Patriotic Notes Float on Ether Waves From Stockton to San Francisco
_____
"Yankee Doodle Dandy" rode through the air from Stockton to San Francisco yesterday on waves of ether. He was started out his aerial flight from the Poulsen wireless telephone and telegraph company stations at the Slough City and was corraled in his travels by the ready antenna of the company local station in the block of land bounded by N and O streets and Forty-seventh and Forty-eighth avenues east of the great highway.
"Yankee Doodle" was sung by the operators at the interior station and the tune was heard as distinctly in San Francisco as if the singer was at a common telephone but a few blocks away. In addition to the vocal numbers, the stations interchanged greetings by the Morse telegraphic code and the apparatus performed other functions of communication.
The Poulsen company has erected a 300 foot tower in its lot and yesterday gave a demonstration of the efficiency of the new system. The exhibition was conducted by P. Jensen of Copenhagen, chief operator, who was a student of the system at the office of Vaswmar Poulsen, the inventor, in Denmark, C. F. Elwell, president of the company, was in charge of the demonstration.
SIGNALS BY TELEGRAPH
In beginning his demonstration yesterday Jensen called up the Stockton and also the Sacramento stations on the telegraphic key and then notified each over the telephone to transmit dots and dashes representing two letters and to keep it up for five minutes. In less than two minutes the messages were received simultaneously on two telephones in the station. Then the program was varied by songs sang by the distant operators.
Transmission by the ticker was then demonstrated. Jensen, working on a small, three keyed instrument, punched on a narrow paper ribbon in the Morse alphabet the question: "How is the weather in Stockton?" He placed the tape in a rapid transmitter and it went to Stockton at the rate of 150 words a minute. The message at its destination was received on a similar machine. In a few moments the answer flew back "Hot; goodbye."
"The improvement in the Poulsen system over the spark system," said President Elwell, "is that it can be operated day or night, over land or sea, at any time, and for great distances. It has a capacity of 300 words a minute. The capacity of a station is 500,000 words in 24 hours each way. The spark system can be used only at night and is intermittent, while this is continuous. The secret of the Poulsen system is an arc inclosed in an atmosphere of hydrogen between a water cooled copper and a carbon end in the generator, which changes into a frequency current that produces 500,000 vibrations a second and is known as the 'undamped oscillation waves for wireless transmission.' "
480 STATIONS PLANNED
It is intended to establish 480 stations in this country, 10 in this state, Washington and Oregon, and one at Honolulu.
It is expected that the system, which will cost $15,000 for each station in the larger cities, will create a revolution in telegraphy, as it will be possible to send messages to Honolulu at any time and in any kind of weather at a 10 cent per word rate and to ordinary points all over the United States for 1 cent a word.
In a few days another tower of the same height will be erected at the local station and provided with enlarged antenna, which will increase the audibility of the messages received, and then there will be three receiving and sending points which can be operated at the same time without interfering with one another, and by a patent "tikker" and a detector messages can not be picked up by another system.