NATIONAL PHYSICAL LABORATORY (C) CROWN COPYRIGHT / SCIENCE PHOTO LIBRARY NATIONAL PHYSICAL LABORATORY (C) CROWN COPYRIGHT / SCIENCE PHOTO LIBRARY
Testing a barometer. Laboratory technician analysing a barometer using testing equipment. The barometer (right) is used to measure atmospheric pressure and forecast the weather. High pressure usually indicates a period of dry weather and low pressure is often linked with rain. Photographed at the National Physical Laboratory, Teddington, UK.
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