1. D. K. Smith, C. F. Cline and D. Van Frechette, see this issue, p. 265.
2. S. B. Austerman, in preparation for publishing.
3. “Growth and Properties of Beryllium Oxide Single Crystals”, presented at the American Ceramic Society Meeting;Austerman,1961
4. Obtained from Linde Co., Crystal Products Dept., Chicago, Ill.
5. Compact High‐Temperature Vacuum Furnace