barograph

Etymology

baro- +‎ -graph

Noun

barograph (plural barographs)

1. A type of barometer that continuously records air pressure on a sheet or rotating drum
   • 1911, Margaret Burnham, The Girl Aviators' Sky Cruise‎:

     Thanks to their barograph, however, they could judge their height above the sea.

   • 1913, Captain R. F. Scott, Scott's Last Expedition Volume I‎:

     At noon the barograph curve turned up and the wind moderated, the sky gradually clearing.