example of a torsion balance survey in an iron-ore mine is presented. A method of correcting for mass irregularities...[In Japanese with English summary]: Geol. Survey Japan Kept. 152, 28 p., 1952. Four gravity surveys were...disturbances observed at Onagawa magnetic observatory, Japan, and at the Tamanrasset observatory in Algiers,...ABSTRACTS 15.2) APRIL-JUNE 1953 chalcopyrite and siegenite. Economic mineralization is characteristically...[In Japanese with English summary]: Geol. Survey Japan Bull., v. 3, no. 4-5, p. 47-51, 1952. Sulfur occurs |