[853] Ibid., No. 3,641. The velocity of a point on the equator of Venus, if Brenner's period of 23h. 57m. were exact, would be 0·28 miles per second; but the displacements due to this rate would be doubled by reflection.

[854] Novæ Observationes, p. 92.

[855] Mém. de l'Ac., 1700, p. 296.

[856] Phil. Trans., vol. lxxxiii., p. 201.

[857] Webb, Cel. Objects, p. 58.

[858] Month. Not., vol. xlii., p. 111.

[859] Bull. Ac. de Bruxelles, t. xliii., p. 22.

[860] Phil. Trans., vol. lxxxii., p. 309; Aphroditographische Fragmente, p. 85 (1796).

[861] Astr. Nach., No. 679.

[862] Month. Not., vol. xiv., p. 169.