-3and anemometer. It is considered desirable to construct at least two of these units together with apvropriate recorders, in order to obtain measurements at more than one level. Such data would be useful in items (1) and (2). Additional developmental work in recorders and data processing equipment is also planned. b. Radioactivity in Meteorological Measurements - A review of the literature clearly indicates that the potential usefulness of radioactive isotopes in measuring meteorological variables has received little attention. The Brookhaven facilities offer unusual opportunities for research of this type. The first step in this investigation would entail consultation with members of other depvartments to determine the most promising lines of approach to achieve the following measurements: ae b. c. d. Rainfall intensity Raindrop size and number Air Pressure variations Humidity Personnel Requirements* Scientist 1 Weather Technicians 2 DOS ARCHIVES