Abstract
INTERESTING modifications of the camera lucida for making larger drawings were recently described in these columns1. A novel use to which I have put this apparatus may also assist biologists in their work. Teachers and research workers in biology who regularly abstract information from the original literature must have felt the need for obtaining accurate copies of diagrams and figures which accompany the text of publications. Various methods of transcription are known ; but apart from tracings, which leave much to be desired, they call for apparatus which is rarely available. The following method of using an ordinary camera lucida of the Abbe type for transcribing diagrams has the advantage of permitting enlargement or reduction of the original.
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