Unpublished diagram, 'Diagram of barometric curves shewing the hourly atmospheric pressure observed on board of H M Sloop Terror between the parallels of 13 degrees North and 13 degrees South latitude' by J H Kay and F R M [Francis Rawdon Moira] Crozier Barometric curves covering the period 21 November 1839 to 13 December 1839. Marked at the bottom of the page with 'J H Kay 1839' and ' F R M Crozier, St Helena, February 7th 1840'. Subject: Meteorology 7 February 1840