A practical treatise on mechanical dentistry . Plumbago crucibles are also made from special patterns, and ex-pressly designed for Fletchers furnaces. To avoid a possible loss of fused metals, which may occur inconsequence of some imperfection in the crucible, a test shouldbe made by placing in it a small quantity of borax and then sub-jecting it to a high heat. If imperfect, the borax, rendered semi-fluid by the heat, will pass through the substance of the crucibleand glaze the surface on the outside. PRINCIPLES OF SOLDERING. Successful soldering is dependent upon several conditions, adisrega
A practical treatise on mechanical dentistry . Plumbago crucibles are also made from special patterns, and ex-pressly designed for Fletchers furnaces. To avoid a possible loss of fused metals, which may occur inconsequence of some imperfection in the crucible, a test shouldbe made by placing in it a small quantity of borax and then sub-jecting it to a high heat. If imperfect, the borax, rendered semi-fluid by the heat, will pass through the substance of the crucibleand glaze the surface on the outside. PRINCIPLES OF SOLDERING. Successful soldering is dependent upon several conditions, adisregard of any one of which may mean much difficulty, or acomplete failure. By the close observance of these conditions 66 MECHANICAL DENTISTRY. the difficulties experienced in soldering- (especially by students)may be reduced to a minimum, in fact the operation becomes verysimple. These conditions are : First, contact of the two surfaces to be united. If, for instance,the ends of a piece of plate are to be united, as in the formation ofa band or
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectdentist, bookyear1903
