Abstract
A NEW apparatus for measuring evaporation is shown in Fig. 1. A pan A contains the material from which evaporation is to be measured; this may be sand, soil, grass, water or other material. The pan A is supplied with water through a perforated tube C from a graduated glass tube E, which acts as a reservoir. The supply is so arranged that the level of the water table in the pan A is maintained constant, while the water required to do this is measured on the glass tube E, in millimetres of depth over the pan A. Thus, if the pan has a diameter of 10 cm. and the tube E, 2 cm., 1 mm. over the area of the pan will mean 25 mm. change of level in the tube. The pan may be of any convenient size to suit the desired conditions, and the bore of the tube E will then determine the magnification.
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OWENS, J. Measuring Rate of Evaporation. Nature 134, 330 (1934). https://doi.org/10.1038/134330a0
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DOI: https://doi.org/10.1038/134330a0