Methodo de Reducção das distancias observadas no calculo da longitudes, Precedido do Exame Analytico sobre os Methodos de determinar a Distancia pelas Alturas sómente, e o de Reducção de Mr. de Bordà.
Coimbra, Imprensa da Universidade, 1805.
Small 8vo. 44 pp., (100) ff. with “Taboa dos Factores” and “Taboa dos Cosenos”showing mathematical tables. With 3 folding plates with calculations. Recent quarter calf.
The author, a member of the Portuguese Royal Academy of Sciences, promotes the method of calculation of the French navigator and scientist, Jean Charles de Borda, and praises its precision. Borda’s “development of a surveying instrument, the cercle de réflexion, contributed to the French success in measuring the length of the meridional arc . . . He contributed memoirs on the calculus of variations and, in connection with his cercle de réflexion, developed a series of trigonometric tables . . . This led Biot to state that one owes to Borda and Coulomb the renaissance of exact physics in eighteenth century France” (Dictionary of Scientific Biography II, pp. 299-300).
Innocêncio III, 27 & IX, 358.