Letters from Lyell, Charles to Moore, J. C, 7 March 1866 - 13 August 1866

Sixteen copy letters and extracts of letters from Lyell to Moore and Croll. Four are summarised as August 1866 'On Climate', 'What small quantity of snow falls at North Pole - attraction of antipodal ice cap', 'On Croll's speculation as to thickness of ice at South pole', and 2 March 1866 'Heath suggestion of glacial [?] and his astronomical paper', and on 7 March 1866 'How does Adhémar melt the ice at one pole?'.