The paraffin blowlamp here shown is used for removing paiut from doors, etc. The reservoir A is made of thick sheet brass strongly soldered. It has a hollow B in the top, in the centre of which the burner is screwed, an asbestos washer making all air-tight. A pipe C, about Jin. bore, is soldered into the burner, and readies nearly to tin-bottom of the reservoir. An air-pump D is soldered or screwed into the reservoir, so as to permit the burner to be screwed in, and a piece of small tube E conveys the air from the pump to the top of the reservoir. The burner consists of a solid brass casting P, the bottom part of which is formed into a hexagon G to fit the spanner, and a screw is cut to fit the screw collar H. A hole is drilled to meet the tube C, as shown by dotted lines at J, and another hole is drilled at k so as to run into J. Two short pieces of tube L1 and L2, about 1 in. are soldered on so as to cover up the holes in F. A piece of tube M, mitred as shown (Fig. 2), is soldered to L1 and L2, the dotted lines showing the position, and another piece of tube, U-shaped (N, Fig, 3), is soldered to M. A nipple O, with a very fine hole in it, is screwed into N, the tube having another piece of metal soldered to it to provide thickness for the screw thread. On working the pump, the space in the reservoir above the oil will be tilled with compressed air, which will force the oil up C, through J and K into L1 and L2, round M, then into N, and out of the nipple O. Some of the oil is allowed to run into the hollow B, and is lighted. As soon as the burner gets hot enough to gasify the oil in the tubes the gas will issue from the nipple with a roar, ignite, and, as it passes through the centre of 11, will turn the oil therein into gas, and so become self-acting. A nozzle or tube Q is attached as shown to concentrate the flame, and a handle and screw cap for filling must be added. A small air-tight tap must be soldered in the top of the reservoir so as to let the air escape when the lamp is done with. Experiment will show how much oil is wanted. It the flame is too large for general use, or if the burner gets choked by too much oil, the tube C can be pinched in a little at the bottom, or by making F a little taller a tap might be arranged for.

Brass and hard solder must be used throughout.

Fig. 1. Making a Paraffin Blow-lamp.