An edition of Letters relating to the transit of Mercury over the sun, which is to happen May 6, 1753 (1753)

Letters relating to the transit of Mercury over the sun, which is to happen May 6, 1753.

Sir, What put me upon giving you the trouble of this, was, the sight which a few days ago I had of some letters from the Royal Academy of Sciences, at Paris, with directions for observing in Canada, the end of a transit of Mercury over the sun ..

By Alexander, James