Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 516
t assumes an almost colorlessappearance; it will then be ready for use. This gilding solution shouldbe worked at a temperature not below 120 degrees Fahr., nor above 130degrees Fahr. About 20 pennyweight of fine gold should be used forthe anode. A good 14 carat gold plating solution is composed of… … Fig. 4,579.—Emery and corundum wheel. Grade 1 is soft and suitable for grinding planerknives, paper cutting, and leather splitting knives, light surface work and roll grinding.No. 36. Grade 2 is for gumming saws, and rough chilled roll grinding. Nos. 36 to 60.Grade 2lA is for grinding moulding…
Electrical engineering
Internet Archive · Brigham Young University · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten07unit-521-351.webp)
![An illustration from XIV [i.e. Vierzehnter] Verbandstag Verband deutscher Juweliere, Gold- & Silberschmiede Strassburg, vom 7.-11. August 1914 : verbunden mit einer Ausstellung alter & neuer Goldschmiedearbeiten und Uhren (1914)](https://img.insideoutlibrary.com/img/200/ia-xivievierzehnter00stra-74-42.webp)
