Vénus - 1769 - Londres, Austin Friars - Alexander Aubert

Transit of Venus over the Sun, observed June 3, 1769, by Alexander Aubert, in Austin Friars, London, three Seconds of Time East of St. Paul's, with a Cassegrain Reflector of J. Short, having a Metal of two Feet focal Length, and magnifying about 110 Times.

Philosophical Transactions Giving Some Account of the Present Undertakings, Studies, and Labours, of the Ingenious, in Many Considerable Parts of the World, vol. LIX, For the Year 1769, 1770, p. 378.

Texte imprimé en anglais.

© Reproduced by courtesy of the Director and Librarian, the John Rylands University Library of Manchester.