1. Benedetti-Pichler, A. A., andSpikes, W. F., Introduction to the Microtechnique of Inorganic Qualitative Analysis, Microchemical Service, Douglaston, L. I., New York (1935).
2. Noyes, A. A., andBray, W. C., Qualitative Analysis for the Rare Elements, Macmillan & Co., New York (1927).
3. Ztschr. analyt. Chem.47, 729 (1908).
4. Benedetti-Pichler andSpikes, ibid.,, pp. 147, 151, 153, 156.
5. Benedetti-Pichler, A. A., andRachele, J. R., Mikrochemie19, 1 (1935).