We must next make the stand for the cylinder to work on. Get a piece of board an inch or more thick, lay the cylinder on it, and mark where the two ends come at G G ([Fig. 4]). The cylinder is to revolve on the spindle, and the ends are to prevent its shifting from side to side, so that your marks will be at the junction. Now get out two uprights from the same thickness of board, and let them be twice the height of your cylinder’s diameter; let one have a hole large enough for the spindle to work in, and let the other have a slit from which the spindle can be kept from rising by a pin run through, as shown in [Fig. 5]. When your uprights are ready, cut the tongues at the end, and then cut the holes in the board for them to stand in. These holes will be to the outside of the lines given by the cylinder, and should be on one side of a line drawn through the centre parallel to the sides of the board. Fit in your uprights and try if the cylinder works freely in them. If all is true and level, take them out and glue them home.
Fig. 6.
Fig. 7.
The next thing to make is the cushion, for which you require a block of wood, like E E ([Fig. 6]), an inch and a half wide, half an inch thick, and not quite as long as the cylinder. Cut a notch in the centre for the upright to be fixed in, and then procure a piece of coloured thin leather, or wash-leather, an inch longer than the wood, and wide enough to go barely round it. Glue it on to the top and bottom of the wood so that it is quite loose in front, and also glue up one end. When the glue is thoroughly dry, stuff the cushion with horsehair or tow, making it as uniform as possible. Glue up the open end. To the under edge of the cushion glue the silk flap, which should pass up in front of the rubber and over the top of the cylinder (see [Fig. 7]). It may be of oiled silk throughout, or it may be made as follows. Glue a piece of leather the same as that used for the cushion along the under edge of the wood. Should you have used a coloured leather for the cushion, you will have to glue it coloured side down, so that the softer surface may come next the glass. This piece of leather should be the length of the cushion and just wide enough to reach to the top. Along its upper edge you have next to glue a piece of black sarcenet, and the leather and the sarcenet should together be as long as the flap would have been had you made it entirely of silk.
Fig. 8.
Fig. 9.