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individual rainstorms. A large number of pluviograms has already been collected for this project. The comparison of various objective methods of forecasting typhoon movement in the China Sea area was continued. These objective methods are now being used opera- tionally as an aid to the forecaster.
Plans were prepared for participation in the International Year of the Quiet Sun when additional radiation measurements and upper air soundings to specially high levels will be required. It is hoped that balloons will reach 100,000 feet on internationally selected days. The calibration and methods of correction of radio- activity measurements were investigated and different radioactive isotopes were tested as standards. Publications were prepared on the following subjects during the year: Hong Kong Meteorological Records for the 72 years 1884-1939, 1947-1962; Comparison of the theoretical performance of various radars; Rainfall measurement with a monthly rain-gauge; and Vector mean winds over Hong Kong 1957-61.
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