著者
堀内 英雄 加瀬 武志 井上 義和 望月 芳義 三木 栄治 鈴木 恒夫 五里主 リチャード H. Hori E. Suzuki
出版者
日本爬虫両棲類学会
雑誌
爬蟲兩棲類學雑誌 (ISSN:02853191)
巻号頁・発行日
vol.2, no.2, pp.22-24, 1965-11-15 (Released:2009-03-27)
被引用文献数
2

蛇の登攀性を知るため次の実験を行なった。1)実際の電柱とほぼ同大の模擬円柱を自製し,凸起物をつけず登攀実験を行なった。2)鉄製櫓を自製し,これが登攀性を試みた。3)実際の電柱の登攀性を試みた。以上の実験の結果次のことを知ることができた。1)円柱にもしあろ高さ以内に身を支えるに足る凸起物のない時は蛇は巻きつくことなくして,この円柱に登ることは不可能である。2)凸起物を有しないある直径以上の太さを有する円柱にもまた登ることは不可能である。3)鉄製櫓には容易に登ることができた。4)鉄枠の温度がある温度以上の時には蛇はこの枠に登らない。5)防御器は条件が揃えば有効と認められた。したがって,蛇がある径以上の太さの円柱または平坦な面を登るには体長の1/x以内に身を支える凸起物のあることを必要とし,鉄製物体に対してはある範囲の許容温度があることを確かめることができた。これらの条件は再吟呼を要するものと認む。
著者
鈴木 恒夫
出版者
経営史学会
雑誌
経営史学 (ISSN:03869113)
巻号頁・発行日
vol.20, no.4, pp.1-28, 1986-01-30 (Released:2010-11-18)

The purpose of this paper is examine the circumstances under which Mitsui Mining Co. had established Miike Chisso Industries and Toyo Koatsu Industries, in three respects; (1) the relations of the dyestuff industry which Mitsui Mining Co. had developed, to the synthetic ammonia industry, (2) the reasons why it had established two companies of the same type, and (3) the meanings of the merger of Daiichi Chisso Kogyo Co.Mitsui Mining Co. started to produce in Taisho Era various dyestuffs using tar collected from coke ovens. In late 1920's, as the production of alizarin and sulphuric dyestuffs had increaced, the demand of the nitric acid, which is necessary for producing dyestuffs, also increased. So, it caused lack of nitric acid. This condition was critical to Mitsui Mining Co., because it had decided to start producing Indigo. Then, it had to make for itself the nitric acid from the synthetic ammonia.On the other hand, having established Miike Chisso Industries, Mitsui Mining Co. set up Toyo Koatsu Industries in order to introduce a new method of the synthetic ammonia, to produce the ammonium-sulphate which were then insufficient in Japan, and to supply Miike Senryo Kogyosho (Miike Dyestuff Works), which belonged to Mitsui Mining Co., with the ammonia to produce the nitric acid. The true reason why it didn't enlarge Miike Chisso Industries but established Toyo Koatsu Industries was to intend tax exemption. So, after the expiration of the special privilege, they were amalgamated.The most difficult and also important problems to produce the synthetic ammonia were to select the technology they shoud adopt and to obtain related skilled engineers, in those days. Mitsui Mining Co. solved these problems by merging Daiichi Chisso Kogyo.