Edinburgh New Philosophical Journal (1840 Edinburgh New Philosophical Journal edinburghnewphil30edin Year: 1840 - 1841 Sir John Robison's Camera Lucida. 403 ticularly calculated for the accurate representation of botani- cal specimens, which it will render in their true proportions, without trouble in adjustments. The disadvantage of the limited range of this instrument is in some measure compen- sated by the facility of its application and by its cheapness and simplicity.—I am, clear Sir, very truly yours, James Tod, Esq. John RoBlSON. Sec. Soc. Arts. The figure represents a piece of thin
Edinburgh New Philosophical Journal (1840 Edinburgh New Philosophical Journal edinburghnewphil30edin Year: 1840 - 1841 Sir John Robison's Camera Lucida. 403 ticularly calculated for the accurate representation of botani- cal specimens, which it will render in their true proportions, without trouble in adjustments. The disadvantage of the limited range of this instrument is in some measure compen- sated by the facility of its application and by its cheapness and simplicity.—I am, clear Sir, very truly yours, James Tod, Esq. John RoBlSON. Sec. Soc. Arts. The figure represents a piece of thin plate-glass A D E F set upright on a drawing-board by means of the wooden stand- ard A B C, in a groove in which the edge of the plate is re- tained by the wedges G and H.* To use this apparatus it is placed in front of the artist, with the standard ABC towards him; the object to be copied is laid on the left hand side of the plate, as at O : the head of the observer being also a little to the left of the pillar, and the eye directed towards the middle of the plate as at M, a distinct image of the object O will be perceived as if it lay on the paper at P ; and as at the same time a pencil held on the right hand side of the plate will be equally visible, it may be applied to trace the image at P. * Tho wooden standard is not fixed to the ikawing-board, and may be set un it in any conycuicnt position.
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Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
