The thing was a heliograph making talk, as it supposed, to the preacher, and Jim watched harder than ever.
Instantly, the ship shone like the polished mirror of a heliograph.
With a turn of the heliograph, a mere turn of the wrist, a message is easily flashed twenty miles to the observer.
He had also been corroborated by a man who had seen the man who took it down from the 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.