The SciencesDirect-Reading Light Intensity Meter, Fireproof Houses in France and moreBy F. D. McHugh on July 1, 1930AdvertisementABOUT THE AUTHOR(S)Recent Articles by F. D. McHughCoal and Kilowatts, Carboloy Extrusion Process, and moreIndian Arrow Poison for Arthritis, Mental Disease, Enamels for Plastics, and moreGlycerine from Petroleum, Electrostatic Iron Ore Separator, and more