Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 595
W … Fig. 1401. Fig. 1402. movable on pin tenons, and those of each half, upper and lower, are connected by a central bar, so that they, are moved together, and adjusted at any angle to the light. In Fig. 1399 the blinds are inside, 4-fold, and folding back into pockets. It is more usual to make the…
Mechanical drawing
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