The Heliography.
11 Reader " wants to know how heliography, by means of which messages are being sent from Ladysmith to Maritzburg is worked. We may explain that this is a method of communicating swiftly between distant points by means of the sun's rays reflected from mirrors. Either successive flashes or obscurations of a continuous reflection ot the sun's light may be combined so as to read like Morse's telegraphic system. The instruments have been so perfectly contrived as to be available at a distance of over 190 miles (in California) and French engineers in Algeria have found the signals serviceable at a distance of 170 miles. Of late years there has been a great development in heliography, or sun-telegraphy, for signalling messages between the sections of an army in the field, as during the British campaign in Afghanistan in 1880. The distance between Lady : smith and Maritzburg is 122 miles. — H. B. Herald.
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Manawatu Herald, 21 November 1899, Page 2
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153The Heliography. Manawatu Herald, 21 November 1899, Page 2
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