Yoshimatsu, T.
New Standard Magnetometers
Memoirs of Kakioka Magnetic Observatory, Vol. 8, No. 2, pp. 1-2, March, 1958
要旨
Encouraged by Dr.K.Wadati, Director of the Japan Meteorological Agency, Tokyo, Dr.S.Imamiti, who retired in December, 1952 from his post of the director of the Kakioka Magnetic Observatory, began to construct in1 950 new electromagnetic Standard Magnetometers, A-56 and H-56, with higher absolute accuracy than tbose hitherto used at Kakioka. He has devoted himself to this difficult and pioneering project in close cooperations with the Special Committee on Standard Magnetometer, chairmaned by Dr.M.Hasegawa, of the Science Council of Japan, and more than thirty of the most famous manufacturing agencies in Japan in various special branches of engineering. He and his successor, Dr.T.Yoshjmatsu, have been faithfully assisted by the skilful magnetician, Mr.M.Hirayama, chief of geomagnetic section, and others of the observatory throughout the total course of progress, during which all participating members of the project were confronted with several difficult problems on both technlque and expenditure, and even unexpected accidents happend as time went on ; otherwise the construction would not make such a good progress that preliminary observations could be begunin March, 1957.
Nagai, M., Kitamura, M.
On the Distribution of Geomagnetic Storms in the Sunspot Cycle
Memoirs of Kakioka Magnetic Observatory, Vol. 8, No. 2, pp. 3-12, March, 1958
要旨
PartⅠ
太陽黒点周期における磁気嵐の年発生頻度の分布について，磁気嵐の型を考慮しない時，著者達は大きな磁気嵐が太陽黒点周期と注目すべき関係があることを見出した。即ち太陽黒点の年平均値をｎとし，ｎの前年との差の絶対値を|⊿ｎ|とすれば，柿岡地磁気観測所におけるＫ指数の一日の合計が30或いは35より大きな磁気嵐の年発生頻度は
aｎ + b|⊿ｎ| + c
によってあらわされる。ここに a，b，c はそれぞれ最小自乗法によって求められた常数である。
PartⅡ
太陽黒点周期と急始磁気嵐の統計的研究から，IGY 観測期間中における1957年及び1958年の柿岡の急始磁気嵐の年発生数は，それぞれ80％の信頼度において30±4 及び 29±4 の範囲で予報できることを示す．
Yokouchi, Y.
Development of SD-field with Storm-Time at Kakioka
Memoirs of Kakioka Magnetic Observatory, Vol. 8, No. 2, pp. 13-32, March, 1958
要旨
柿岡にて観測された磁気嵐資料により ＳＤ field の時間的推移を調査した．
Yamaguchi, Y.
S.i. Phenomena
Memoirs of Kakioka Magnetic Observatory, Vol. 8, No. 2, pp. 33-40, March, 1958
要旨
地磁気の急変化の中，s.s.c.，p.s.c.，s.f.e. 以外に未だその性質の余り明瞭でないものがある．その種の変化の主なる特徴を記述した．
Yamaguchi, Y.
Note on the Average Lunar Diurnal Variation at Kakioka
Memoirs of Kakioka Magnetic Observatory, Vol. 8, No. 2, pp. 41-46, March, 1958
要旨
柿岡に於ける地磁気太陰日変化の季節変化，及び黒点との相関に，他の観測所の結果と稍々異る点が見出されることを，主として地磁気偏角の結果から述べる．
柳原一夫
大地比抵抗の測定について
地磁気観測所要報, 第8巻, 第2号, pp. 47-52, 1958年3月
要旨
The current devices for the apparatus of direct measurement of earth-resistivity, are generally based on tbe Gish-Rooney's apparatus or ratiometer. Longer the base length becomes, the more the signal from the inner electrodes reduces. The double commutator may be a seat of the troublesome instability brought about on the measurement by longer bases, especially for routine use of daily measurements. Mutual inductance between the current-lines and potential-lines effects on the ratio V/I measured by null method. On these standpoints, some modifications including the two phase compensation of ratio meter are taken into consideration and an apparatus for routine use is deviced (Fig.2). Some experimental and field tests are shown.
三崎方郎, 河村まこと, 近藤五郎
柿岡に於ける空地電流の測定について
地磁気観測所要報, 第8巻, 第2号, pp. 53-64, 1958年3月
要旨
最近，晴天時の気象電気現象の原因と地球電荷の保持に於ける無擾乱域の役割との解明のために，気象電気三要素（大気電場，大気篭気伝導度及び空地電流）の同時連続観測の重要性が Israel 等によって強調されて来た．
柿岡に於いては，過去約30年に亘る大気電場の連続自記観測と一定期間の大気伝導度の目視観測とが行われて来たが，偶々今度の国際地球観測年を機に空地電流及び伝導度の連続観測が実現した．今回は装置の取扱い上の便宜ということに主眼をおいて，測定装置の原理と操作とに就いて詳述する
Kakioka Magnetic Observatory
Geomagnetic Indices Ｋ and Ｃ for 1956 at Kakioka
Memoirs of Kakioka Magnetic Observatory, Vol. 8, No. 2, pp. 65-67, March, 1958
