550 



SCIENCE PROGRESS 



No 



I 



2 



3 

 4 

 5 

 6 



9 

 io 



ii 



12 



13 



14 

 15 



16 



17 

 18 



19 



20 

 21 

 22 

 23 

 24 



25 

 26 



27 



28 



29 



Date of perihelion. 



B.C. 

 B.C. 

 B.C. 

 B.C. 

 A.D. 



A.D. 



240, May 

 163, May 



87, Aug. 



12, Oct. 



66, Jan. 



141, Mar. 



a.d. 218, Apr. 



A.D. 



A.D. 



A.D. 

 A.D. 

 A.D. 



A.D. 



A.D. 



A.D. 



A.D. 



A.D. 



A.D 



A.D 

 A.D, 

 A.D, 

 A.D, 



A.D 



295, Apr. 

 373. Nov. 



45 1 July 

 530, Nov. 

 607, Mar. 



684, Nov. 



760, June 



837, Feb. 



912, July 



989, Sept. 



1066, Mar. 



1 145, Apr. 

 1222, Sept. 

 1 301, Oct. 

 1378, Nov. 

 1456, June 



15 



20 



15 



8 

 26 



25 

 6 



7 



7 



3 

 15 

 26 



26 



10 



25 



19 



15 



25 



19 

 10 



227 



877 

 821 



A.D. I531, Aug. 25-8 

 26-87 



A.D. 

 A.D. 

 A.D. 



A.D. 



A.D. 



1607, Oct. 

 1682, Sept. 

 1759, Mar. 



1835, Nov. 



1910, Apr. 



14-81 

 1257 



1 5 '94 

 17 



Julian day. 



1,633,898 

 1,662,027 

 1,689,873 

 1,717.321 

 1,745.190 

 1,773.007 

 1,800,778 



1,828,903 

 1,857,607 

 1,885,969-5 



1,942,849 

 1,971,219 

 1,998,810 

 2,026,828 



2,054,366 



2,082,548 



2,110,498 



2.I39-378 



2,167,646 



2,196,54370 



2,224,68477 



2,253,02121 



2,280,49280 



2,308,303-87 

 2.335.655,81 

 2,363>592-57 



2,39i.598-94 

 2,418,779 



Interval in 

 days. 



28,129 

 27,846 



27,448 

 27,869 



27,817 



27,771 

 28,125 



28,704 

 28,362 

 28,990 

 27,890 

 28.370 



27,591 

 28,018 



27,538 

 28,182 



27,950 



28,880 



28,268 



28,898 



28,141-07 



28,33644 



27,471-59 



27,811-07 



27,351 '94 

 27,93676 



28,006-37 



27,180 



Where seen. 



Notes. 



China 



China 



China, Rome 

 China 



China 



China, Rome 



China 

 China 

 China, Rome 



China, Europe 

 China 



China, Japan 



China 



China 



China 



Europe, China 



China 



Europe, China 

 Europe, China 

 China 

 Europe, China 



Europe 



Europe 



Europe 

 /Throughout 

 \ world 

 f Throughout 

 \ world 



Identification doubtful. 

 / No record : from cal- 

 t dilation only. 



{Very fully described by 

 Chinese. 



' "Fearful, flamingstar." 

 Preceded death of 

 Emperor Macrinus. 



Preceded death of Attila. 

 Called Lampadias. 



/"Drawing made at 

 \_ Nuremburg. 



/Preceded death of 

 \ Louis leDebonnaire. 

 (No record : from cal- 

 ^ culation only. 



/Norman conquest, 

 \_ Bayeux tapestry. 



War against Turks. 

 /First return discussed 

 \ by Halley. 

 (Second return dis- 

 \ cussed by Halley. 

 Periodicity discovered. 

 ( First predicted re- 

 \ turn. 



/Second predicted re- 

 \ turn. 



(Some give dates a 

 ^ month or two later. 



on earth, so that valuable political information was to be gained 

 from a study of the heavens. We see the occurrence of a 

 similar idea in the West in the many cases where they have 

 recorded that a comet appeared before the death of a king, or 

 other striking event. Josephus noted that a great curved comet 

 was seen for several months, not long before the fall of Jeru- 

 salem ; it is not unlikely that this was the apparition of a.d. 66. 

 Similarly for the deaths of Macrinus, Attila, and Louis le Debon- 

 naire. Up to the apparition of 1378 inclusive the Chinese 

 records of position are superior to the European ones ; the 



