1. Qualitative Analysis for the Rare Elements, New York 1927.
2. A. A. Benedetti-Pichler andW. F. Spikes, Microtechnique of Inorganic Qualitative Analysis, New York 1935, in future referred to as P.-S.
3. P.-S., p. 148.
4. P.-S., p. 153.
5. Use a bath similar to that shown in Fig. 70, P.-S., employing ice water as a bath liquid.