Fig. 175 shows a simple form of lamp for heating the soldering-iron : a is the casing; b, lamp and uptake; c, flame; d, baffle-plate; e, top of stove; f, tilt; g, wires; h, place for the bit. Make the tilt just high enough for the proper heating of the bit, and let it rise 1 in. higher at the back. Adjust the lamp, etc, that the article is not covered with a deposit of carbon (soot).

The following is a simple and useful adjunct to the "solderer," in order to do away with the nuisance caused by the smoke from an ordinary gas-burner. Take a piece of sheet tin - say 7 in. by 7 in.; turn it round into a cylinder, and rivet. (The small brass nails, to be had at any ironmonger's, are handy; make holes with a bradawl, and snip off the tack to the desired length, and rivet; 4 will be plenty in cylinder.) Vandyke one end all round, turn down a flange at the other end, make a circular cover for this end, and fill full of holes by means of a fine sprig bit; rivet this, then, on to flange with 4 tacks; make a hole to receive an ordinary gas-burner - say, 2 in. from the bottom or vandyked end, and solder the burner (the new brass ones are the handiest). Now procure a piece of vulcanized rubber pipe of 1/4 in. bore, draw over the burner, and also over an adjacent burner in the shop, and turning on the gas you have a beautiful blue and smokeless flame, with great heat. Fletcher, of Warrington, sells very useful little implements for heating the soldering-iron by a suitably arranged gas-jet.