The metal worker's handy-book of receipts and processes : being a collection of chemical formulas and practical manipulations for the working of all the metals and alloys including the decoration and beautifying of articles manufactured therefrom, as well as their preservation (1890)
Brannt, William T. (William Theodore), 1844- · Philadelphia : H. Carey Baird & Co. ; London : Sampson Low, Marston, Searle & Rivington · leaf 289
ffle of stout sheet-brass. It is pro¬ vided on one side with a lid which, with its projecting edges, can be pushed into the muffle. The furnace is constructed of double sheet-iron, and the space between the outer casing A B C D and the inner casing c is filled with a bad conductor (ashes, etc.).… … Fig 21. dicated in the illustration, by spirit flames. The size of the muf¬ fle as well as of the entire apparatus depends on the dimensions of the largest article to be decorated. Another muffle-furnace is shown in Fig. 21. O is the actual furnace of refractory material, M the clay muffle resting…
Metal-work · Metals
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