During the Jowaki Afridi expedition sent by the British-Indian government in 1877, the heliograph was first tested in war.
32.
At 1820 that day, " McCall " s crew observed a heliograph from a cliff south of Uruno Point.
33.
Heliograph Peak, as one of the highest mountains in southeast Arizona, served as one of the peaks in that system.
34.
Niepce called the permanently fixed, direct positive picture _ the first ever captured from nature _ a " heliograph ."
35.
In the modern era, semaphores and wireless solar telegraphs called heliographs were developed, using coded signals to communicate with their recipients.
36.
The heliograph was a simple but effective instrument for instantaneous optical communication over long distances during the late 19th and early 20th century.
37.
Visibility was improving about 07 : 30, and by 07 : 55 the fog had lifted sufficiently for heliographs to be used.
38.
However, on the evening of 27 June he received a heliograph message from Millot, ordering him to return to Hanoi at once.
39.
A historic fire lookout was partially burned, and an electronic equipment storage shack was damaged Tuesday when the Gibson fire hit Heliograph Peak ."
40.
Fire lookout towers were used in the United States in the early 20th century and fires were reported using telephones, carrier pigeons, and heliographs.
