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• Airborne dust collected at King's Park on a glassfibrefilter.• Total wet and dry deposition from the atmospherecollected at King's Park.• Daily rainfall (if any) collected at the Observatory.Observatory staff assembled a radioactivity counter to testthe samples.In November 1964, the Atomic Energy Research Establishment,Harwell, UK, installed an additional air sampler atthe station, and samples were sent to Harwell for furtheranalysis.A new atomic sealer was installed in May 1963, replacingthe home-made equipment.Research and consultation:There has been increasing interest in the application ofmeteorological data to engineering design such as thedevelopment of water resources, the design of tall buildingsand the design of drainage systems.The Observatory takes part in such studies, and specialinvestigations are made when required.The Observatory routinely records all available dataon tropical cyclones in the western North Pacific andSouth China Sea. Guidelines are developed on aspects ofweather associated with tropical cyclones to help improveforecasting.Hong Kong's winter weather is to a large extent controlledby surges in the winter monsoon. Weather patternsleading to the arrival of cold surges in Hong Kong areexamined and common features identified to help forecasters.Heavy rain causes much loss and damage through floodsand landslips in Hong Kong every year. The Observatoryinvestigates major rainstorms to identify precursors inweather patterns, and studies the application of informationfrom radar and satellite observations.The long series of meteorological observations made atthe Observatory, including studies of extreme winds, is usedin engineering design.127