Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 196
cerium in minute quantity. Here was a dis-covery of the highest moment; at the end of many experimentsit was determined that one per cent, of cerium and ninety-nine percent, of thorium oxide are the best proportions for a mantle suchas we use to-day. Why these proportions are best nobody knows,any… … Dr. CARL FREIHERR AUER von WELSBACH of Vienna. ALCOHOL LAMP 157 bustion is thorough, so that it throws into the air a much lowerpercentage of injurious products than does an ordinary gas flame.It never smokes, and its light is so steady as to be available forwork with the microscope and other…
Inventions · Inventors
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