314 Astronomical and Nautical Collections. Log. Sin. 3°38′ 8′′ for 8.8020567 read 8.8021567 8.9160160 III. Hutton's Tables, sixth edition, 8. London, 1822. P. 186 Log. 1007 for 6030295 read 0030295 532 cot. 40° 56" for 1·1539754 read 1·1530754 312 Astronomical and Nautical Collections. ii. Errors in the best TABLES of LOGARITHMS; collected from various Authorities. I. Callet's Tables Portatives. [Those which are marked with an obelisc are corrected in some later copies.] Log. 910 for 95904136 read 95904139 † Astronomical and Nautical Collections. 311 No. Year. REMARKS. (15.) 1682. This orbit of Halley's comet deserved to be inserted, because it rests wholly on Cassini's observations, while all the rest are p. 162. derived from Flamstead's. Hist. Ac. Par. 1759. 55. 1743. In these elements, the first observation of Grischow has been employed with the rest. The observations of this comet cannot be represented by a parabola, and inaccurate as they are, they still appear to indicate an ellipticity of the orbit. In Lacaille's elements the longitude of the node should be 23. 18° 21′ 15′′. 56. 1743. For D we must certainly read R: and the angle between the perihelium and the node must consequently be 3s. 28° 42' 33". Astr. Nachr. N. 48. p. 494. 124. 1822. These improved orbits of Gambart and Nicollet are found in the Connaissance des T. 1826. p. 219, 278, with the observa tious made at Marseilles, and at Paris. Gambart computes from the mean equinox of 12th May, 1822. 125. 1822. Rümker has deduced both his orbits from the observations made by himself at Paramatta up to the 11th November. I have assumed the longitude of Paramatta 9h. 54m 44. Encke in his last orbit has comprehended both the European observations and those of Rümker: so that these elements seem to be preferable to any other. Gambart computed from the mean equinox of 12th July: Rümker 1 Jan. and Encke 25 Oct. 1822. Connaiss. des T. 1826. Astr. Nachr. II. N, 37. p. 207... III. N. 55, p. 107... Many astronomers have omitted, after the most accurate determination of the orbit of a comet, to mention the date of the place of the equinoctial point, from which they compute the longitudes. For the sake of uniformity, and in order to avoid all uncertainty and confusion, it is much to be desired, that all computers would employ the place of the equinox for 0 January, in the year to which the perihelium of the comet belongs. * Professor SCHUMACHER, the ingenious editor of these Essays, requests his Correspondents to observe, that his usual residence is at ALTONA, and that Professor Schumacher, of Copenhagen, is an anatomist, Additions and Corrections for the Catalogue of Comets. 310 Astronomical and Nautical Collections.. 11 14 43 5 0 25 25 54 2 16 16 0.838181 9.923338 0.075121 23 18 2 39 9 1 40 32 3 2 42 23 6 1 1 51 52 40 41 1.146112 0.0592269 9 8712879 R Rümker 23 19 23 48 9 1 36 18 3 2 42 23 6165 52 40 41 1.146091 0.0592191 9 8712997 0.9923022 R Rümker 23 18 37 50 9 1 40 16 8 3 2 44 1.8 6 1 3 45 052 39 9.61.145066 0.0588305 9.87188260-99630211 R Encke |