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Inventory for A892 
Collection Index:DE LA CAILLE, Abbe Nicolas Louis, Astronomer, 1713-1762
Collection Name:Abbe Nicolas Louis DE LA CAILLE, 1713-1762
A892 Abbe Nicolas Louis DE LA CAILLE, 1713-1762 (Astronomer)   
    
 Copyright 2011, Historical Papers, The Library, University of the Witwatersrand, Johannesburg, South Africa   
    
 Notebook relating to the measurements of the Cape Arc of Meridian by de la Caille   
    
Abbe Nicolas Louis DE LA CAILLE's Working Notebook, 1746-1754   
    
 172 pages (38 blank), Holograph   
    
 Bound in 18th century suede, this 16,5 x 21,5 cm notebook contains observations made by De la Caille at the Cape and elsewhere; a list of expenses in connection with his observatory at St. Martin (Paris); and details of the mathematical basis for his calculations, including lists of formulae and trigonometrical proofs, used as an aide-memoire during his travels. There are calculations of some star coordinates, apparently made at the Cape, and, most important of all, a calculation of the difference in latitude between the Cape and Klipfontein for his determination of an arc of the meridian.