Photograph, engraving of a table teaching making and use of a weatherglass, 1631 Photograph, engraving of a table teaching making and use of a weatherglass
Weather compendium combining cistern mercury barometer, alcohol thermometer and thread hygrometer by George Graham, Fleet Street, London, 1739 Weather compendium by George Graham
Absolute mercury manometer. Used for measuring absolute pressures between one atmosphere & zero under any contitions of surface pressure & temperature. No.11. Made at Kew Observatory 1941. Part of Meteorograph Calibration Apparatus. Absolute mercury manometer