A rare mid-nineteenth century scientific barometer c1850           A rare mid-nineteenth century scientific barometer c1850            A rare mid-nineteenth century scientific barometer c1850

Stock No. C958

Price: 5,500

 

A rare mid-nineteenth century
scientific barometer c1850

  • A rare mid-nineteenth century scientific barometer with a large diameter tube and a movable scale with rack and pinion adjustment.  This enables the zero position to be accurately set to the level of mercury in the short limb.
     
  • The barometer and a thermometer are mounted on a mahogany backboard.
     
  • The barometer has a tube, of constant bore throughout its length, of approximately 1 inch diameter and the lacquered brass scale is graduated from 27 to 31 inches of mercury.
     
  • The vernier and travelling microscope enable the pressure to be read to an accuracy of 0.002 of an inch.
     
  • The silvered thermometer scale is graduated from 0 to 130 degrees Fahrenheit.
     
  • The instrument has a replacement barometer tube, and a replacement thermometer tube.
     
  • The mahogany backboard on which the barometer and thermometer are mounted is hinged to a second mahogany board so that the screws into the wall are concealed.

 

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