Handy man's workshop and laboratory . rt of the work has been already done, and it is desiredto unite several pieces, having parts which have been previouslysoldered, in close proximity, these parts may be held in any po-sition, and at the same time the joints already soldered may beprevented from melting by incasing the work in the followingmanner. (See Fig. 130.) Take equal parts of plaster-of-Paris and fine, sharp sand; HANDY MAN S WORKSHOP AND LABORATORY III add a sufficient quantity of water to make a thick batter, andimbed the work in it, leaving the entire joint to be soldered andthe ad
Handy man's workshop and laboratory . rt of the work has been already done, and it is desiredto unite several pieces, having parts which have been previouslysoldered, in close proximity, these parts may be held in any po-sition, and at the same time the joints already soldered may beprevented from melting by incasing the work in the followingmanner. (See Fig. 130.) Take equal parts of plaster-of-Paris and fine, sharp sand; HANDY MAN S WORKSHOP AND LABORATORY III add a sufficient quantity of water to make a thick batter, andimbed the work in it, leaving the entire joint to be soldered andthe adjacent parts exposed. Care must be taken to not get theplaster in the joint, as that would prevent the solder flowing. It is difficult to hold all the various parts which are to be unitedso as to apply the plaster. The parts may be put into position oneby one, and fastened temporarily by means of a drop of wax,which, when the work is incased and the plaster sets, may bereadily melted out and the flux and solder applied. In every case. Fig. 131—Soldering flame where it is possible, the flux should be well brushed into thejoints before placing the work on its support. A convenientway of preparing flux for small work is to rub a piece of boraxabout, with a few drops of water, on a porcelain slab or commonslate until it appears like paste; this should be applied to thework with a camels hair pencil. Small pieces of solder aredipped into the borax paste and put on the joints of the work. Apair of tweezers will be found convenient for this. When the job is incased as in Fig. 130 it may be placed in acommon fire until it has nearly attained a red heat, when it willbe found that on applying the blow-pipe the solder will readilyflow with little expenditure of time and breath. Just here, perhaps, it is well to notice the action and use of theblow-pipe and the structure of the blow-pipe flame. 112 HANDY MAN S WORKSHOP AND LABORATORY When a jet of air from a blow-pipe is directed into a
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