Keywords: Phosphorus Furnace by G.C. Landis.jpg Uploaded with en wp UW marker 2014 05 12 Design for an electric arc furnace to produce phosphorus from 1907 patent by G C Landis book The Electric Furnace Its Construction Operation and Uses By Alfred Stansfield 1914 1907 G C Landis It is a patent and also out of date for copyright PD-old-70-1923 Media needing chemical classification |