Peter Mayer wrote: > > I'm attaching a tiny JPEG illustration, taken from an ancient > dictionary, which accompanies the definition of 'heliograph'. The > instrument definitely has a mirror! But as you'll see, it also incorporates > a telegraph key and a sighting vane. My recollection is that they were > used by military forces in the 19th century in places like India. (I have > a half-baked recollection that Kipling refers to one in a poem...¿Is that a > source?!) >
Good illustration, thank you. The telegraph key certainly makes it easier to use. Now I only have to learn Morse code and find someone else to talk to across the valey... When my sundial indicates the sun is shining (mandatory reference to sundial). - fernando -- Fernando Cabral Padrao iX Sistemas Abertos mailto:[EMAIL PROTECTED] http://www.pix.com.br mailto:[EMAIL PROTECTED] Fone: +55 61 321-2433 Fax: +55 61 225-3082 15º 45' 04.9" S 47º 49' 58.6" W 19º 37' 57.0" S 45º 17' 13.6" W
