L. Observations of the transit of Venus on June 3, 1769, and the eclipse of the Sun on the following day, made at Paris, and other places. Extracted from letters addressed from M. De la Lande, of the Royal Academy of Sciences at Paris, and F. R. S. to the Astronomer Royal; and from a letter addressed from M. Messier

Abstract

M. Messier, with the best achromatic telescope at Paris, of 12 feet focus, made by M. Antheaulme, observed the first internal contact at 7th 38' 43", apparent time reduced to the Royal Observatory, and, he thinks, without an uncertainty of two seconds: and this is the observation in which I most confide.