Japanese‐American Instrument Tests

In mid‐October, a group of Japanese scientists joined a US Coast and Geodetic Survey team aboard the Survey's ship Pioneer in San Francisco to carry out inter‐calibration tests of gravity meters and magnetometers made in the United States and in Japan. The testing program, conducted on the oceanographic equipment evaluation range in the Pacific, will compare the La‐Coste gravity meter with Japan's Tsuboi single‐string gravity meter. Two American‐made magnetometers, the Warren‐Vacquier and the Varian Proton, will be compared with the Japanese Rikitake‐Uyeda magnetometer.