Microscopic Writing.—A machine has been recentlyinvented in London, with which a writer, using a pen in the usual manner, can at the same time produce a duplicate so small as to be invisible to the naked eye, yet so distinct that a microscope will reveal every line and dot. A most useful application of the apparatus will bo for the prevention of forgery, as private marks can be made on notes and securities, legible under microscopic power, but which no imitator could see or even suspect the existence of, The inventor, a Mr Peters, states that the entire contents of the Bible can, with the help of this machine, bo written twenty-two times in the apace of a square inch.
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Bibliographic details
Cromwell Argus, Volume II, Issue 97, 19 September 1871, Page 6
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120Untitled Cromwell Argus, Volume II, Issue 97, 19 September 1871, Page 6
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