Note:  Do not rely on this information. It is very old.


Heliograph, or Heliostat, is an instrument for flashing messages from one point to another by means of sunlight reflected from a mirror. Its chief applications have been to military tactics. Signalling has been effected through a distance of 190 miles in California and 170 miles in Algeria.

“For God did not send his Son into the world to condemn the world, but to save the world through him.”
John 3:17