The Dictionary Of Photography

A True Historic Record Of The Art & Practice Of Photography 100 Years Ago.

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funnel, as shown in fig. 129, pass this tube through the hole, leaving the funnel as near the middle of the cylinder as possible. The tube should protrude some little distance from the outside of the cylinder; make this water-tight either by solder or by packing. Next form a bottom out of zinc, and solder carefully on to the end farthest away from the funnel. Then proceed to make a cone-shaped lid, about 9 ins. in diameter at the top; this can be done by forming a circle out of tin or zinc, 12 ins. in dia-meter, and cutting a piece out, 71 ins. at the edges, and meeting in the centre (fig. 130). Then lay one part over the other, just 1 in. at the edge, solder, and make water-tight. This is for covering the cylinder, and ought to hang 5 ins. from the top.
Fig. 130.                                                         Fig. 131.
The lip of the cone must stand directly over the funnel. From these directions and illustrations any metal worker will make the apparatus at small cost. Stout tin will serve well. In order to use, pour about a quart of water into the cylinder, fix on the top so that no steam can possibly escape, and fill the cone with cold water. Heat to boiling point with an ordinary gas-stove or spirit-lamp. The steam rises and settles on the cone, where it is condensed by the cold water outside. It then trickles down, drops into the funnel, passes down the tube, and is caught in a jar or bottle placed for the purpose as shown in the illustration (fig. 132). After using, and before putting on one side, every-thing should be rinsed out, cleaned, and dried, especially the cone top, funnel, and tube, in order to free them from dirt or