Note 15 — Chapter III · SOIL ANALYSIS AND THE HISTORICAL METHODS OF SOIL INVESTIGATION.
Reading edition
See: On the interpretation of mineral analyses, by S. L. Penfield, Amer. Jour. Sci., (4), 10, 33, (1900); The analysis of silicate and carbonate rocks, by W. F. Hillebrand, Bull. No. 305. U. S. Geol. Surv., 1907; Manual of the chemical analysis of rocks, by H. S. Washington, 1904, p. 24; Über Genauigkeit von Gesteinanalysen, von M. Dittrich, Neues Jahrbuch für Mineralogie und Palaeontologie, 2, 69, (1903).