312 Observations of the Appearance of the Comet.in every respect. Hence we may see how much ‘vder, in the. event, scientific investigation is than vatiue conjectures. I subjoin the elements of the comet of 1661, and tin se now-given bv Burckhardt:CO MKT 1661. BtnCKHAHDT.Long, of node.....S3 cleg. 30 mill. 140 dev. 13 min.Inclination ...32 dlt; g. 33 min. 72 cleg. 42 min._ s— Z~-yPlace of perihelion, 1 1 3 dee.- 58 min. 74 deg. 12 min.Perihelion dist 4 2.6'0(),0u0 miles. 96.000,000miles.I am, dr, your obedient servant,Andrew Urh.