Sweet Charlotte's are the deep grey eyes That win profound devotion; Bright Carry's flash, like azure skies, With heliograph in motion.
"Fringilla: Some Tales In Verse"
Richard Doddridge Blackmore
The Chief Signal Officer has charge of the system of communicating with distant points by means of various systems of signals, the most noteworthy of which is that of the heliograph, by which information is conveyed by the use of sun-reflecting mirrors.
"Government and Administration of the United States"
Westel W. Willoughby and William F. Willoughby
Communication has been established between points 125 miles distant by means of a heliograph with a reflecting surface of but twenty square inches.
"Government and Administration of the United States"
Westel W. Willoughby and William F. Willoughby