196 



EECEEATIYE SCIENCE. 



PP. 



d.h. 

 Winter 

 April 29 

 July 

 Oct. 8, 19 



Jan. 14, 4 

 March 29, 2 

 Nov. 9, 23 

 July 3, 13 

 Oct. 20, 14 

 July 11, 18 

 August 29, 7 

 April 7, 6 

 June 11 

 June 6, 14 

 Feb. 23, 23 

 Dec. 30, 3 

 Sept. 11, 23 

 April 1, 

 Feb. 15, 

 Sept. 21, 21 

 Jan. 30, 7 

 July 15, 23 

 March 31, 7 

 September 

 Oct. 23, 23 

 Jan. 15, 1 

 Nov. 25, 23 

 March 11,4 

 October 13 

 Nov. 8, 18 

 Oct. 16, 6 

 Nov. 5, 4 

 June 8, 23 

 Sept. 3, 16 

 Oct. 7, 9 

 Feb. 28, 5 

 Dec. 24, 11 

 Sept. 3, 15 

 Aug. 24, 21 

 Oct. 19, 14 

 Oct. 19, 22 



32S 

 251 

 71 



313 



84 



318 



143 



150—210 

 230 



300—330 

 330 



270—330 above 30 



220 

 150—180 

 28 



32 40 

 12 60 

 189 



58 or 238 

 158 45 

 294 15 

 128 17 



20 

 70 

 10 +, 



40 3 



17 



44 



10 



60 30 



4 8 



46 31 



61 49 

 10 or 12 

 79 33 



very sm. 

 101 

 0-80 

 0-58 



0-445 

 0-720 

 0-372 



0-341 

 0-775 

 0-907 

 0-963 



0-642 



0-580 



0-552 



0-568 



0-720 



0-928 



0-738 



0-943 



0-430 



0-318 



0-333 



0-640 



0-828 



1-0 



0-456 



0-958 



0-583 



0-774 



0-329 



0-586 



2-103 



0-853 



0-539 



0-738 



0-386 



0-5670 



0-6125 



0-5091 



Calculator. 



PiffgrS 

 Peirce 

 Peirce 

 Hind 



Hind 



Hind 



Burekhardt 



Laugier 



Burekhardt 



Burekhardt 



Laugier 



Hind 



Laugier 



Laugier 



Pingre 



Hind 



— iBurckhardt 

 —I Hind 



+ Hind 

 +'Burckhardt 

 4- Pingr6 

 -j- Pingro 



— Pingre 



+ iBurckhardt 



— ,Laugier 



— iLaugier 



+ Burekhardt 

 Burekhardt 

 Peirce 

 Laugier 

 Hind 

 Hind 

 Pingre 

 Hind 

 Laugier 

 Laugier 

 Hind 

 Laugier 

 HaUey 

 M^chain ") 

 Halley j 



Date of 

 Discovery. 



68, July 23 

 11, Aug. 26 



66, Jan. 31 

 141, Mar. 27 

 240, Nov. 10 

 451, May 17 

 539, Nov. 17 

 565, Aug. 4 

 568, Sept. 3 

 574, May 2 

 760, May 16 

 770, May 26 

 837, Mar. 22 

 962, Jan. 28 

 989, Aug. 5 

 1066, April 2 

 1092, Jan. 8 

 1097, Sept. 30 

 1231, Feb. 6 

 1261, July 14 

 1299, Jan. 24 

 1301, 



1301, Sept. 16 

 1337, May 

 1351, Nov. 24 

 1362, Mar. 5 

 1366, Aug. 26 

 1378, Sept. 26 

 1385, Oct. 23 

 1433, Oct. 12 



1456, May 29 



1457, June 

 1463, Sept. 

 1471, Dec. 

 1491, Jan. 

 1506, July 31 



1531, July 13 



1532, Sept. 22 



Discoverer, 



Greek obs. 



Chinese obs. 



Ditto 



Ditto 



Ditto 

 Ditto 

 Ditto 

 Ditto 

 Ditto 

 Ditto 

 Ditto 

 Ditto 

 Ditto 

 Ditto 

 Ditto 

 Ditto 

 Ditto 

 Ditto 

 Ditto 

 Ditto 

 Ditto 

 China & Europe 

 Chinese 



(?) 



China & Europe 



Ditto 



Chinese 



Ditto 



Ditto 



Ditto 



Ditto 



Ditto 



Europe & China 



European obs. 



Ditto 



Kegiomontanus 



Chinese obs. 



Ditto 



P. Apian 



P. Apian 



Duration 

 of Visibility, 



5 weeks. 

 5 weeks.* 

 9 weeks.* 



4 weeks.* 

 6 weeks.* 



13 weeks.' 



9 weeks.' 

 15 weeks. ^ 

 10 weeks.'" 

 13weeks(?).ii 



8 weeks. '^ 



10 weeks.'* 



5 weeks.'-* 

 5 weeks. 



5 weeks.'* 



6 weeks or +.'* 

 17 weeks." 



4 weeks.'" 



4 weeks. 



3 months. '9 



11 weeks.2» 



{?).2' 

 6 weeks.'-' 

 3 or 4 months.*' 



1 week.2* 



5 weeks." 

 Several days.*' 



6 weeks.*' 



(?).28 



2 months (?). 



1 month.23 



3 months.30 



2 or 3 months." 



3 months.32 



(?).33 



2 weeks. 5* 

 5 weeks.** 



10 weeks.** 



' Is said to have separated into two parts, 



* It had a short, but brilliant tail. 



* An apparition of Salley's comet (?), mentioned by Dion. 

 Cassius as having been suspended over Bome, previous to the 

 death of Agrippa. 



* An apparition of Halley' s comet (J). It had a tail 8=" 

 lone, 



* An apparition of Halley' s comet. 



« Elements somewhat doubtful. It had a tail 30^ long, 



' Undoubtedly an apparition of Salley's comet, 



» It had a tail 10 feel long. 



' A mean orbit. It had a tail 10° long, 



1" Elements very reliable. On September 8tb it had a tail 

 40^ long. 



" Elements uncertain. 



'* An apparition of Halley' t comet. 



1* It had a tail about 30^ long. 



'• Tolerably trustworthy. The maximum length of the tail 

 was 80'', but it dwindled down to 3^ in a fortnight. 



'* Probably an apparition of Halley'a comet. Mentioned 

 by several Saxon writers. 



'8 Possibly an apparition of Halley'i comet. This is the 

 famous object which created such universal dread throughout 

 Europe in 1066. la England it was looked upon as a presage 

 of the success of the Norman invasion. 



" Elements satisfactory. 



" A tail 50^ long. Was seen in China, and much bifur- 

 cated. 



1" One of the grandest comets on record. Its tail is said 

 (o have been 100' long. 



*" Elements very doubtful. 



*' Very uncertain. 



*2 Probably an apparition of Halley' s comet. 



** A fine comet. The elements assigned by Halley, Pingrft, 

 and Hind differ somewhat from those here given. 



** Very uncertain. No latitudes given. 



** Uncertain. The tail was 20 feet long, and the head was 

 the size of a wine-glass ! 



26 "Very uncertain. 



*' An apparition of Halley's comet. 



*8 Tolerably certain. The tail was 10' long. 



*9 An apparition of Halley's comet. It had a splendid tail, 

 60' long. 



*" Only approximate, 



*' Uncertain. 



** A celebrated comet. When at its least distance from 

 the sun (3,300,000 miles) on January 21, it was quite visible in 

 full daylight. It had a fine tail, which the Chinese say was as 

 long as a street ! 



J3 Uncertain. 



3* Elements uncertain. It was as large as a ball/ and had a 

 tail from 3' to 5' long, 



3* An apparition of Halley's comet. 



3" It had a tail several degrees long. Gibers has computed 

 an orbit which agrees well with Halley's, but Mdchain'a is con- 

 sidered the best. 



(To he continued.) 



Geo. W, F. Chambees. 



