Society of Glass Technology · [Sheffield] · leaf 503
Fig. 51. 142. Removal of Scum in … Tank Furnaces. J. R. Scohy(U.S.A. Pat., July 20th, 1920,No. 1347181. Filed November28th, 1919, No. 341274).—Atank furnace having a floatingbridge, 2, has pockets, 3, formedin the side walls closely adjacent,the ends of the floaters to collectscum, which is deflected into thepockets by the…
Glass
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten15unit-729-394.webp)
