PELL PAPERS. Solutions of various trigonometrical, optical, and philosophical problems, with tables of logarithms, etc., and (in 4426) some tradesrnen's and household bills (1661-1663) and family notes.
ROYAL SOCIETY PAPERS. Letters relating to the transactions of the Royal Society addressed chiefly to Thomas Birch and other secretaries, or to successive Presidents, or to the Society itself as a body. Some refer to papers and communications included in Add. MSS. 4432-4441. The names of the writers are to be found in the Index of the present Catalogue. Two volumes (not arranged in strict order of date); 1663-1765.