"All this was crude," he says himself, "but further than this I had proposed with the view of influencing the vegetation of certain plants to invert, by means of a Heliostat and a reflecting mirror, the motion of the solar rays which should strike them from the birth of their earliest shoots.
"Makers of Modern Medicine"
James J. Walsh
No day that you can't use a Heliostat; Sunlight is eternal in Medicine Hat.
"The So-called Human Race"
Bert Leston Taylor
The Heliostat can be used when the sun shines to transmit news by flashes of sunlight chopped up into the Morse code and thrown from point to point by a moving mirror.
"Electricity and Magnetism Nature's Miracles, Vol. III."
Elisha Gray