CATALOGUE. ASTROVOSir, STARS. 



331 



History of ^new stars observed wilbin 150 Pigott on the changes of two stars. Ph. tr. 



years. Ph. tr. 1715. XXIX. 354. 

 Maraldi on the changeable star in the whale. 



A. P. 1719-94. H.eei. 

 Maupertuis on the changesofstars.Ph.tr. 



1732. XXXVII. 240. A. P. 1732. H. 85. 

 Barker on the mutations of stars. Ph. tr, 



1760. 



Produces 5 authorities to show that Sirius was formerly 

 leddish, and even redder than Mars, and proves that it is 

 now white. 

 Herschel on the periodical star in the whale's 



neck. Ph.tr. 1780. 338. 



The change was before obserred to happen about seven 

 times in six years. 

 Herschel on changeable stars. Ph. tr. 1792. 



24. 

 Herschel on the changes of stars. Ph. tr. 



1795. 166. 

 Herschel on the changes of alpha Herculis, 



and on the rotation of stars. Ph. tr. 1796. 



452. 



Its period flo i days. 



Goodricke on the variation and period of the 

 light of Algol. Ph. tr. 1783. 474. 1784. 

 287. 



The period 2d. 20h. 4S' S6". 



Goodricke on the changes of beta lyrae. Ph. 

 tr. 1785. 153. 



Varies from the 3d magnitude to the 4th or 5th : the 

 period isd.ioh. '■' i 



Goodricke on the changes of delta Cephei. 

 Ph. tr. 1786. 48. 



It vurici from 31 to 41 or the sth magnitude. The pe- 

 riod 5d. 8h. 37'|. The variation of Algol is not always 

 equal in degree. 



Englefield, Palitch, and Bruhl on the star 



Algol. Ph. tr. 1784. 1,4,5. 

 Pigott on the changes of eta Antinoi. Ph. 



tr. 1785. 127. 



From. the third or fourth to the fourth or fifth magnitude : 

 period 7d. 4h. as'. 



Pigott on changeable stars in general. Ph. 

 tr. 1786. 189. 



1797. 193. 



In Sobiesky's shield^ and in the northern crown. 



Huber on the star Algol. N. Act. Helv. I. 



307. 

 Lalande on the star Algol. A. P. 1788. 240, 



Assigns 2d. 20h. 49' 2" as its period. 



Wurmon Algol. Zach. Ephem. II. 210. 



Its period 2d. 20h. 48'. 58".? from 15 yeai^ observation. 



•Twinkling of the Stars. 



Garcin on the twinkling of the stars. A. P. 

 1743. H. 28. 



Observes, that at Bender Abassi in Asia, where the air is 

 very pure and dry, the stars have a light absolutely fixed. 



Michell. Ph. tr. 1767. 234. 



Attributes the twinkling to the irregularity of the emis- 

 sion of light. 



Sun. 



Joh. Fabricius de maculis in sole observatis. 

 Wittemb. I6II. M.B. 



The discoverer. 

 Epistolae ad Velserum de solis maculis. 4. 



Augsb. 1612. 

 Sc/ieineri rosa ursina. f. l6S0. M. B. 

 Cassini on the sun's motion. Boloirna. 



Ace. Ph. tr. 1672. VII. 5001. 

 Derham on the solar spots. Ph. tr. 171I. 



XXVII. 270. 



Thinks them the clouds of volcanos, afterwards becom- 

 ing faculae. 



Crabtrie, in 1840, calls them e-^halations like clouds. 



281. 



Jiauseft Theoria motus solis. 4. Leipz. 1726. 

 Krafftde distantia inacularuma soIq. Comm. 



Petr. VII. 279. 

 A. Elder de motu solis determinando. C. N. P. 



XII. 273. 

 f Horsley on the sun's atmosphere. Ph. tr. 



1767. 398. 



