This barometer has a brass tube and an iron cistern at the bottom. The barometer scale is divided from 26 to 36.5 (inches of mercury) with divisions to 0.05. The thermometer is divided from 10 to 120F with 1F divisions. The barometer is mounted on gimbals to keep it steady on a pitching and rolling ship. The Meteorological Office serial number and maker's name are inscribed next to the barometer scale as 'M.O.1142 P. ADIE. 1. Broadway. WESTMINSTER'

The Kew pattern marine barometer became the standard model used on royal navy and other ships in the late 19th and early 20th centuries. Patrick Adie was the maker who helped to develop the Kew pattern barometer, of which this is an example of the Mark 1, and was one of the principal manufacturers.