The thing was a heliograph making talk, as it supposed, to the preacher, and Jim watched harder than ever.
He had also been corroborated by a man who had seen the man who took it down from the heliograph.
With a turn of the heliograph, a mere turn of the wrist, a message is easily flashed twenty miles to the observer.
Instantly, the ship shone like the polished mirror of a heliograph.
“He said you understood—Britt did,” clamored MacLeod, hastening around in front of the heliograph.
If there is no sun I cannot heliograph and I have a host of signals to look up and get ready.
And the glass of water she lifted pierced like a heliograph into the room.
To this shot the heliograph flashed a cordial expression of approval.
Then the heliograph in the zeriba began to talk in flashes of light that opened and shut capriciously.
Far across the plains I saw a flashing light, as of a heliograph.