Before revision: World 64, 35 (1915); Paper 27, 18 (Feb. 9, 1921), and U. S. Patent 1225250 (May 8, 1917)Ingersoll R. S., The Glarimeter, “ An instrument for measuring the gloss of paper ” .
After revision: World 64, 35 (1915); Paper 27, 18 (Feb. 9, 1921), and U. S. Patent 1225250 (May 8, 1917)Ingersoll R. S., The Glarimeter, " An instrument for measuring the gloss of paper " .