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π SIMILAR VOLUMES
## Abstract A description is given of one flight below cumulus clouds on 28 Aug. 1952. Small rapid fluctuations of temperature were observed by a sensitive resistance thermometer, records being obtained as a photographic trace. It is shown that, with respect to the frequency and type of fluctuation
## Abstract Cloud particles of diameters greater than about 100 ΞΌ can be sampled from an aircraft by exposing within the cloud a thin aluminiumβfoil surface to the airstream and counting and sizing the indentations made on it. A series of flights has been made through cumulus clouds using this tech
## Abstract In a fairβweather cumulus, the largest droplets, which are of 18 microns radius, grow too slowly by differential settling to become precipitation (although the time to reach raindrop size from 50 ΞΌ, for instance, would be comparatively short). Even at 18 ΞΌ their terminal speed is suffic