Samuel was a balloon pilot as well as first chief of the Army
Aviation Division. He sent Airplanes to Mexico chasing Pancho
Villa.
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“Another chapter in aerial achievement is recorded in the
sending of a wireless message from an aeroplane…McCurdy.”
This is the first wireless message sent from an aviator in flight to
a receiving station on earth.

J D A McCurdy, a pupil of Glenn H Curtiss was both aviator and
sender and Harry M Horton acting under supervision of Major
Samuel Reber of the U S signal corps, was the receiving operator.
McCurdy had attached a key to his steering wheel.

http://www.newspaperabstracts.com/link.php?id=27201

By Wireless ‘Phone from Arlington to Paris
http://earlyradiohistory.us/1915ATT2.htm

Owing to the fact that France is at war and that wireless is
playing a most important part in the working out of the French
military communication system, it was with extreme difficulty
that officials were persuaded to permit the use of the 1,000 foot
Eiffel Tower station at Paris for the receipt of the radiophone
messages from Arlington. . . .

In order that there could be no doubt of the genuineness of the
tests, officers of the French Government, two or more of whom
represented the army, were with Messrs. Shreeve and Curtis in
Paris, while Colonel Samuel Reber, of the United States Army and
other American army and navy officers watched intently the
experiments at Arlington.

Army Combat Photography – With the addition of photography
as a Signal Corps function, the corps published a Manual of
Photography, written by First Lieutenant Samuel Reber in 1896.

http://www.army.mil/-news/2008/06/15/9674-just-one-more–
combat-photography/

I have some articles and photos of Samuel Reber and his family.