Abstract
DURING the last year we have maintained in continuous action an apparatus for recording the electric charge on individual drops of rain. A drop of rain in order to have access into the insulated receiver has first to pass through a fixed but adjustable cylindrical opening of average diameter 1.4 cm. and then through a second opening of diameter 2.4 cm. at the periphery of a rotating disc. Both openings are provided with trap arrangements so that a drop striking the sides is caught and led away. The period of rotation of the disc is so adjusted that with moderate intensity of rain a second drop may not enter into the receiver until the charge of the first has been recorded and the system earthed by an automatic device. A glass manometer of very fine bore is attached to the receiver and keeps a record of the size and number of drops.
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BANERJI, S., LELE, S. Electric Charges on Rain Drops. Nature 130, 998–999 (1932). https://doi.org/10.1038/130998b0
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DOI: https://doi.org/10.1038/130998b0
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