Adrian (Michigan) Daily Telegraph, December 23, 1919, page 1:

CAROLS  MAY  BE  HEARD  OVER  LENAWEE  COUNTY  BY  WIRELESS TONIGHT
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By  The  Associated  Press
    ANN ARBOR, Mich., Dec. 23.--Southeastern Michigan will receive its first aerial Christmas carols tonight, if plans of Colonel J. P. Lucas, military instructor at the University of Michigan here, do not miscarry. Colonel Lucas will transmit broadcast over a six hundred meter wave a number of Christmas musical numbers from the university radio station. Amateurs with ordinary receiving sets may hear the music. Colonel Lucas will transmit between 8:30 and 9:30 o'clock.
Ann Arbor (Michigan) Times News, December 24, 1919, page 8:

LOCAL  AMATEUR  HEARS  CAROLS  BY  WIRELESS
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    Perhaps the first of the amateur radio experimenters of this locality to report on the reception of radiophone music, sent out broadcast last night by Col. J. P. Lucas of the university, is Carl Beiser, 600 East Washington street, this city, a 17 year old high school lad.
    Carl, tuning his instruments last night for the experiment, heard clearly and distinctly, the song "O Silent Night" transmitted from the university radio station. He then heard "Humoresque", "Traumeri" and several others, practically all the numbers transmitted from Col. Lucas instruments.
    The experiment is the first of its nature to be tried broadcast in this section, it is believed.
Adrian (Michigan) Daily Telegraph, December 29, 1919, page 1:

WIRELESS  WAVES  TO  CARRY  GREETINGS  OF  NEW  YEAR
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By  The  Associated  Press
    ANN ARBOR, MICH., Dec. 29.--New Year's greetings will be transmitted broadcast by both radiophone and wireless telegraph from the stations at the University of Michigan on the night of December 31. The message will be sent out under the direction of Colonel J. P. Lucas and amateurs are asked to report on receiving of it. A wave length of 600 and 668 meters will be used.
Ann Arbor (Michigan) Times News, January 2, 1920, page 1:

SPREADS  NEW  YEAR  MESSAGE  VIA  'AIRLINE'
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Ether  Waves  Carry  Rev.  Douglas'  Message
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    Br-r-r-r---Crash----crash---b-r-r-r splutter!---
    And with a roar and crash and a brilliant display of electrical energy from the transmitting set of the University of Michigan radio station, the air became the transmitting medium for a most unique New Year's message on Wednesday night.
    Franklin Johnson, university student and amateur radio operator was at the key of the big plant and he sent out a message, broadcast on a 640 meter wave, which, according to J. C. Evans, of the university faculty, should have been heard for approximately 1,000 miles or better.
    Immediately at the close of the telegraph message, sent in international code, Rev. Lloyd Douglas of the Congregational church spoke into the transmitter of a radiophone set the following New Year's greetings, a reply from some station, the location of which was undetermined, indicated that it had been perfectly received:
Has  Unseen  Audience.
    "It is a great pleasure and privilege to speak to you,--my unseen friends--in this peculiar way. It is so strange, it is almost uncanny,--to feel that my words are going out to you, through the darkness, by means of contact entirely invisible and mysterious.
    "I am informed that so long as I hear no objections, from you, I am to conclude that you approve of my sentiments; and if any one of you cannot stay through my entire address, please retire very quietly so that the others in the audience may not be disturbed.
    "It appears that the secrets of nature, like long-imprisoned birds, are being released, one by one, as mankind develops sufficient ingenuity to accept and utilize them.
    "The fact that we at now in possession of this new process of communication only means [we] are considered wise enough and good enough to be made custodians of this secret.
    "We are about to enter upon a new year. May I express the wish that it may be a very happy one for you--and if it is to be happy for you, it must be full activity,--for you are not to kind of people who could be contented otherwise.
Prosperity  Ahead.
    "We are entering upon a year of great prosperity, as a people; Probably the greatest prosperity ever registered in the history of any nation in human history. Therefore, we will face many grave temptations; for it is in his prosperity, rather than in his adversity, that a human being faces his greatest dangers, undefended.
    "Let us not boast ourselves, overmuch, because of our nation's brave show of wealth and successfulness, in material things; for such evidenced have always been on display by every nation--riding for a fall--and never more gaudily exhibited on the morning of the last day.
    "If we are to make our nation great--it must be great of soul, revealing a magnitude of mind, and sensitiveness of conscience that bespeak the possession of certain spiritual qualities which are as far above the material--as the capacity of the other, through which I speak to you, is above the limitations of wires spanned on poles.
People  Must  Do  It.
    "And if this ennobling of our nation's soul is to be achieved it must come to pass in the hearts of the people who compose this republic.
    "Many wise men are saying that our social order has come to an hour of great significance; and that our course, today,--whether it be toward finer and larger progress in the things that really matter, or toward an increasing emphasis upon things that have no permanent value to society.
    "You and I can only determine that course, for ourselves, and in our own hearts. We will have done our part, if we decide that question wisely.
    "Therefore, as we pass into the new year of 1920, let us go buoyantly, eagerly, expectantly, as travellers who rise to greet the dawn, resolved that, whatever others may do we will try to make our own lives worth while, and justify our right to live in this strategic age.
Reports  Are  Asked.
    Ray E. Basset of Community Service, under whose auspices the messages were transmitted, expected to receive many reports from amateur stations over the United STates upon the contents of the messages sent out. Amateurs were asked to make these reports to the local office. The work was done under the direction of Col. J. P. Lucas of the university faculty and Mr. Evans supervision.
    Following is the telegraphed message:
    Saluting twentieth year of twentieth century our world' depleted batteries of happiness and hope must be recharged. The century's newly discovered physical forces have been taught to do evil. They must henceforth be taught to serve, lift, help, heal, else we are better without them. High time to radiate happiness, good will, friendly service, human welfare. We wish you Happy New Year...
COMMUNITY SERVICE.    

The (University of) Michigan Technic, March, 1920, page 69:

SIGNAL  CORPS  LABORATORY
    The laboratory of the Signal Corps unit of the R. O. T. C. is in room 105, New Engineering Building. The equipment on hand at present is, principally, that which was used for field communication in France. This consists of telegraph, telephone and radio equipment, signal lamps, etc. The radio equipment is more extensive than any other as this branch of the service of communication is becoming of increasing importance and will probably in the next war supplant, to a large extent, the use of wire.
    The only transmitter in use at the present time is an undamped wave set sending at 825 Meters. In a few days, however, a spark set will be in operation on a wave length somewhere between 400 and 800 Meters.
    In addition to this, considerable experimenting has been done with the Wireless Telephone. These signals can be picked up by any damped wave set at about 685 Meters. Any student who is interested in this apparatus and would like to inspect it is at perfect liberty to visit the laboratory. Arrangements should be made with Captain Lucas in Room 239.
The (University of) Michigan Technic, May, 1920, pages 103-104:

UNIVERSITY  WIRELESS  STATION  RECEIVES  LICENSE
    The University wireless station has been assigned its former call letters (8 X A) and has resumed its pre-war basis. This station is for experimental purposes only. However it is equipped with the latest equipment and is capable of receiving messages from about 7,000 miles. This station is open to visitors on Monday evenings. At other times it is open to operators exclusively.
    The call letters of the wireless station of the Signal Corps is W  N  9.