Adams, John D. (John Duncan), 1879- · Chicago : Popular Mechanics Co · leaf 38
32 METAL WORK AND ETCHING as indicated at A in the working drawing. Bend these up from thin metal, and then thoroughly scour them and the back with emery cloth. This brings us to the feature of soldering, which will prove surprisingly simple if gone about correctly. The art of soft solder- ing is… … Figf. 13 — Detail of Desk Calendar muriatic acid dissolve as many pieces of scrap zinc as possible and then strain the solution, which may then be used to solder any ordinary metal, except alumi- num. Some wire solder having been procured, moisten the two pieces to be joined with the above solution…
Metal-work · Etching
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
