Snelling, Henry Hunt, 1816-1897 · [New York : W.B. Smith] · leaf 271
31 blet near the corners; and the whole isretained in a proper position by means ofscrews, as represented at d d d d. Second Operation.—It is necessaryfor this operation, which is really the mostimportant of all, that a box, similar to figs.32 and 34, be provided. Figure 32 re- … 32 presents a section, supposed to pass downthe middle of the apparatus by the line ab, in fig. 33, which represents the box asseen from above, c is a small lid whichaccurately fits the interior, and divides thebox into two chambers. It is kept con-stantly in its place when the box is not inuse—the…
Photography · Art and photography
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