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Raman spectra shows good agreement, especially with the results of Kohlrausch and Stockmair. The superior resolving power of the prism spectrometer used in this work is illustrated by comparison with the work of Gordy7 on dioxanewater mixtures using a fluorite prism spectrometer. In the region 5.9 to 6.5 µ (1695 to 1538 cm.-1) Gordy used too thin a cell (0.02 mm.) to detect the six weak bands found by us. In the region from 4.4 to 5.2µ (2273 to 1923 cm.-1) Gordy finds one band at 5.05µ (1980 cm.-1). Our instrument resolves this band into two at 1964 and 1982 cm.-1. The single band found by Gordy at 3.38µ (2959 cm.-1) was resolved by our prism instrument into three bands as shown in the curve inserted in Fig. 1 (top). Subsequent examination on the grating spectrometer showed four bands at 2855, 2891, 2917 and 2961 cm.-1 (Fig. 1, bottom).

LETTERS TO THE EDITORfor investigating possible anisotropy in oriented crystals. The preliminary data agree in order of magnitude with the results deduced by Jones 6 and Blackman 7 from the magnetic susceptibility. experiments. However, their ellipsoidal models do not appear to explain our data. The interpretation of our results for multiple carriers is quite involved, particularly for the magnetic field parallel to the metal surface. 8 The simplest situation occurs for transverse H and circular polarization, 9 which would also permit the distinction between holes and electrons. More complicated cases involving ellipsoidal models are being analyzed. The theory which excludes the phenomenon of anomalous skin effect will have to be further refined.We would like to thank Dr. H. J. Zeiger and Mrs. Laura M. Roth for many helpful suggestions and discussions and Mr. W. M. Walsh, Jr. for assisting with some of the experiments.

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