Unpublished diagram, 'Climate of London: Yearly proportions of the opposite winds: The mean temperature and rain in a cycle of 18 years by the lunar declination' by Luke Howard A circular chart in coloured ink showing meteorological data for the period 1815 to 1832. Around the centre of the circle is a KJV Bible passage, Genesis 1:14 ('And God said, Let there be lights in the firmament of the heaven to divide the day from the night; and let them be for signs, and for seasons, and for days, and years') and a reference to Psalm 104:19. Subject: Meteorology 31 March 1841