in the various escaping into the room, while it admits of viewing the manipulations, are rarely exact or trustworthy. The ordi- plate as it lies in the bath. nary wet methods of analysis are rather complicated, slow, The invention will be readily understood by reference to and expensive, good work… … a vacuum pan, where, at a temperature below 160° Fah., it boils and is rapidly concentrated to any degree desired. The ELECTBO-ASSAY OF COFFEB OBES. vacuum pan employed is a close vessel of copper, egg- •F Correspondents who have asked how to test copper ores shaped, about six feet high and four…
Patented · Boiler · Feet · Improved · Water · Patents · Scientific American · Consists · Large number · Feed water · Cubic feet · Steam boiler · Sewing machine · Square foot · Three feet · Hot water · Steam pump
Internet Archive · Public domain (published before 1931). Free to use for anything.
