HELIOGRAPH
—none. 1 signalling apparatus reflecting sunlight in flashes. 2 message sent by means of this. —verb. Send (a message) by heliograph.
—none. 1 signalling apparatus reflecting sunlight in flashes. 2 message sent by means of this. —verb. Send (a message) by heliograph.
—none. 1 signalling apparatus reflecting sunlight in flashes. 2 message sent by means of this. —verb. Send (a message) by heliograph.
—none. 1 signalling apparatus reflecting sunlight in flashes. 2 message sent by means of this. —verb. Send (a message) by heliograph.