Excerpt from Manual of Instruction in Hard Soldering Any clear flame may be used for hard soldering with a blowpipe. That of illuminating gas is to be preferred if obtainable. Away from cities where gas is common, the alcohol lamp is most used. Several kinds Of lamps are now sold that are adapted to the wants of the trade, but if these are not at hand a tinner can soon make one. It should hold at least 4 oz. Of alcohol, and have a wick tube attached near the bottom not much less than one-half inch in diameter. The top of the wick tube should be cut off obliquely, the left side, as it sits facing you, being the lowest. The wick, when saturated, should be so tight that. Although it may be moved up or down in the tube, it will remain in any position. The wick tube must have a cap fitting snugly, to cover the end of the wick when not in use. The size Of the lamp should correspond with the Size of the work and amount of heat required. Blast lamps, furnaces and hearths are now sold, a description of which I leave to the manufacturers. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Excerpt from Manual of Instruction in Hard Soldering About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 edition. Excerpt: ...water necessary to balance one cubic inch of the respective metals. Tenacity of metals is ascertained by observing the weights required to break wires drawn through the same orifice. They stand in the following ratio: Iron, 269 Gold, ... 68 Copper, --157 Tin, -24 Platinum, --124 Zinc, IS Silver, -85 The different metals become fusible, or melt, according to Prof. Daniel's pyrometer, at the following degrees of wmperature: MBTAL. fAHBBHHRIT. C1NTI&RADB. Bismuth, .... 497 258 Copper, 1996 1091 Gold, Iron, cast, ...-2786 1630 Lead, .... 617 826 Nickel and Iron, wrought, high-est heat of forge. Platinum, not fusible in ordi-nary furnaces. Silver, .... 1878 1023 Tin, 442 228 Zinc, 778 412 Alloys of metals vary from the mean melting point oi the metals of which they are composed. They usually melt at a lower degree of temperature than the mean, and sometimes at a lower degree than either of the metals of which they are composed, as for instance, tin solder, composed of two parts tin and one of lead, melts at about 360 F. A hard solder, composed of two-thirds silver and one-third spring brass, melts easier than either the silver or the brass. APPENDIX. Mats to hold the work on, while being heated, are now made of charcoal cut into rectangular pieces and chemically treated to prevent burning when not in use. A valuable improvement. They are also made of asbestos for special purposes, as for holding dental plates, spectacle bows and for melting small bodies of metals. Magnesia blocks and carbon blocks are also used by jewellers. Attach to your mouth blowpipe a steel point, projecting beyond the bend, to touch fused solder that does not go where you want it. When it is necessary to use alcohol the article made from wood answers the purpose and i