Note 35 — Chapter III · Investigation of Microscopic and Optical Characters of Minerals.
Reading edition
Sitzungsberichte der k. k. Akad. der Wiss., Wien, 1893, I Abt., p. 358. Translation by L. McI. Luquer in School of Mines Quarterly, Vol. XXIII., Jan., 1902, No. 2, p. 127. Review by Viola in Min. Pet. Mitt., Vol. 14, p. 554. Methods of Petrographic-Microscopic Research, F. E. Wright, 1911, p. 95.