. The book of photography; practical, theoretical and applied. Fig. 53.—Section of Slotted Rail. tension frame (Fig. 54) to run freely in thegrooves of the baseboard rails. The fo-cussing screw J may be purchased readymade ; it is fitted bj^ screwing down the boltG to the baseboard, and the nut to theend of the extension frame at H. Con-struct the sliding frame (Fig. 55) by dove-tailing four pieces each 16 in. by 3 in. 38 THE BOOK OF PHOTOGRAPHY. Inside this fit a frame K 1| in. wide, flushwith the front edges, and screw across twogrooved pieces l for the rising front, 3 16 in. The risin
. The book of photography; practical, theoretical and applied. Fig. 53.—Section of Slotted Rail. tension frame (Fig. 54) to run freely in thegrooves of the baseboard rails. The fo-cussing screw J may be purchased readymade ; it is fitted bj^ screwing down the boltG to the baseboard, and the nut to theend of the extension frame at H. Con-struct the sliding frame (Fig. 55) by dove-tailing four pieces each 16 in. by 3 in. 38 THE BOOK OF PHOTOGRAPHY. Inside this fit a frame K 1| in. wide, flushwith the front edges, and screw across twogrooved pieces l for the rising front, 3 16 in. The rising front board may nextbe got out, with the two rebated rails forthe sliding front; this is sufficiently ex-plained by Fig. 56. The sliding front orlens board is shown in Fig. 57. Now makethe back frame (Fig. 58), giving about | Fig. 54.—Extension Frame Sliding Frame. slope to the top and bottom to allow ofswing. These four pieces, 141 in. by 3 in.,are dovetailed together. Then sink thenuts for the thumb screws B^ and thepivots A^ Inside the framework fit care-fully a framework M exactly | in. from the ill ll! i 1 ! =^0=^.^0- llll ?I J ^^??-;-=^o ~~^ e—j j 1; ? 1 1 %J. t .Y
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectphotography, bookyear
