1. Of the authors, Mr. Hatano and Mr. Matsuda were with Shimazu Machinery Systems Inc., 1-8-1, Tukinowa, Ohtsu, Japan, at the time the work described in this paper was carried out. Mr. Hatano has since retired to live in Sagatenryuji-ryumon-cho, Ukyo-ku, Kyoto, Japan, and Mr. Matsuda is with the Shimazu Corporation, 1 Nishinokyo-kuwahara-cho, Nakagyoku, Koyto, Japan. Professor Dr. Okamoto and Mr. Matsushita are with the Institute of Scientific and Industrial Research, Osaka University, 8–1, Mihogaoka,...