ADDITIONS AND CORRECTIONS.
Page vi, line 2 from top, for Ferdinand, read Frederick.
„ 20, line 34 from top, for into, read in.
„ 51, line 43 from top, for has read have.
„ 70, line 21 from top,/or that, read twice that.
„ 70, line 9 from bottom, for 10", read 18".
„ 81, line 1 from bottom, after Sciences read 1707.
„ 81, line 9 from bottom, for Pond, read Pound; read also similarly pp. 84, 130.
„ 82, line 4 from top. Bradley’s tables of Jupiter ’s satellites, although not published
till 1749, were printed off in 1719. His discovery of aberration did not occurtill a few years afterwards. This circumstance accounts for the erroneous valuewhich he assigned to the equation of light in his tables.
„ 119, line 20 from top, for third, read first.
„ 122, line 9 from bottom, for September read June.
„ 150, line 2 from bottom, for 62 s read 52*.
„ 172, line 34 from top ,for 1846 read 1845.
„ 188, line 6 from bottom, for ^ read 53 ^ 2 .
„ 197, line 1 from top, for 1850 read 1851.
„ 212, line 13 from top. The utility of the transits of the inferior planets for deter-
mining the solar parallax was first announced by James Gregory, (p. 428.)Halley merely pointed out the peculiar advantages which the transits of Venus offered for this purpose.
„ 217 lines 4 and 5 from top, for pole read axis.
„ 253, line 17 from top, for ^ read
„ 415, line 1 from top, for Vitellionem read Vitellion.
„ 512, line 27 from top. The stars of M. Kiimker’s great catalogue have beenobserved at Hamburgh : they are consequently visible in the northern hemis-phere.
„ 542, line 3 from bottom, for 1.6 read 1.2.
,, 543, line 2 from top, for 2.014, which is equal to 1.6 -f* 414, read 1.614, whichis equal to 1.2 -f- 414.