Urbino, L. B. (Levina Buoncuore), -1888, Day, Henry, Duke University. Library. Jantz Collection. German Americana · Boston : J.E. Tilton · leaf 49
ck,which are raised at the two extremes of a board thebreadth of the frame : the cheeks are grooved to re-ceive the frame. In the middle of this board squareholes must be made to receive the movable eye-holepiece, so as to be raised or lowered at pleasure. Atthe top of this is a circular piece of… … Place this instrument before the object you woulddraw, look through the little hole, and if you see allthe proposed objects on the glass, the instrument isrightly fixed; otherwise, fix the sight nearer the glassin one of the other square holes, adapt the eye-piece thehight you wish, and fasten it…
Decorative arts · Decoration and ornament · Art
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