- Lightweight Sentry drones with infrared eyes can find lost hikers
- Sentry-Open-with-Highlights Getting lost while you're hiking can be bad news. A few basic survival skills never do any harm, but some 4,000 people go missing each year.
- Amazing photos of Nottingham from around the turn of the century
- From the time when Joseph Nicephore Niepce took the first, very blurred 'heliograph' in 1826 or 1827, the speed by which pioneer photographer-scientists improved on the nascent technology was astounding. By the 1870s and 1880s superb, pin sharp ...
- Band To Buzz About: Wall of Trophies
- Washington, DC indie duo, Wall Of Trophies – comprised of Brittany Jean and Will Copps – captured my heart this winter with their debut album, Heliograph.
- The Talking Mirrors: Another look at heliography communication
- According to "Global Networking: a Timeline 1800-1899," "Henry Christopher Mance (1840-1926), of British Army Signal Corps, builds a heliograph, an optical sunlight-based signaling device. It had tripod-mounted mirrors, with one mirror linked to a key ...
Heliograph is described in multiple online sources, as addition to our editors' articles, see section below for printable documents, Heliograph books and related discussion.
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