Handy man's workshop and laboratory . p room, which to most amateurs means a great deal. Theone illustrated can easily be carried in the pocket, so it is evidentthat the space required is indeed small. To construct one of thissize, about 6 feet of copper or brass tubing 5/16 of an inch out-side diameter will be required, also 2 feet of band iron about 1/16of an inch thick by Y$ of an inch wide. Before bending thetubing to the required shape, it is necessary to fill it with lead orsand to prevent buckling. Either of these will be found to give 122 HANDY MAN S WORKSHOP AND LABORATORY good result
Handy man's workshop and laboratory . p room, which to most amateurs means a great deal. Theone illustrated can easily be carried in the pocket, so it is evidentthat the space required is indeed small. To construct one of thissize, about 6 feet of copper or brass tubing 5/16 of an inch out-side diameter will be required, also 2 feet of band iron about 1/16of an inch thick by Y$ of an inch wide. Before bending thetubing to the required shape, it is necessary to fill it with lead orsand to prevent buckling. Either of these will be found to give 122 HANDY MAN S WORKSHOP AND LABORATORY good results, though for the smaller sizes of tubing lead is pre-ferable. It is not advisable to attempt pouring the molten leadin the tube, as it cools too rapidly. The safest way is to use wiresolder. A piece two or three feet longer than the tube will as arule be enough. The lower end of the tube will have to be closedby hammering it down. Insert the wire solder, hold the lowerend of the tube over a flame to melt the solder, at the same time. Fig. 137—The blowpipe in use pressing the wire slightly. Move the tube slowly over the fireand it will quickly melt the Jead, and one may feel sure there areno bubbles. To form =the xouV use a round bar about % of aninch in diameter. A broom handle will prove useful. It is bestto reduce the nozzle a slightly, to increase pressure of the gas asit becomes heated in the coil. After this is done, and the coilassumes the shape shown, we can proceed to remove the lead,which may be easily done by heating over a fire until the leadmelts, then by shaking slightly it will run out and leave the tubeclear. The valve may be dispensed with, and a rubber tube froma convenient gas jet may be slipped on. This blowpipe is adapted for gas under considerable the pressure obtainable is low a larger pipe should be used HANDY MAN S WORKSHOP AND LABORATORY 123 and be bent into a smaller coil, and the constriction at a will beunnecessary.—86 FORMULAS FOR S
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Keywords: ., book, bookcentury1900, bookdecade1910, booksubjectworkshoprecipes
