Unpublished paper, 'Description of a self registering thermometer and barometer unveiled by the late James Coggan Esq and bequeathed by him to the Royal Society' by Roderick Impey Murchison Murchison writes that his late friend, Coggan, asked that his self-registering thermometer and barometer be presented to the Royal Society, and shares a brief description of the equipment. Marked on back as 'archives'. Subject: Engineering 1838