CATALOGUE. ASTRONOMY, PLANETS, 



333 



Herschel on the rotation of the planets. Ph. 



tr. 1781. 115. 

 Ducaila on the rings of the planets. Roz. 



XIX. 386. 

 Ximenes on the density of the planets. Soc. 



Ital. III. 278. 

 Sclnoter on the planetary atmosphere^. 



Bode Jahrb. 1793. Getting. Anz. 1792. n. 



86. 

 *Murhard on the planetary atmospheres. Ph. 



M.VI. 166. 

 Melanderhielm on planetary atmospheres. 



Gilb. m.96. 

 fVoigt on the rotation of the planets. Gilb. 



VII. 232. 

 tOnOphion.Gilb. XI. 482. 



Supposes that the comet of 1759 may be considered as a 

 planet beyond the Georgian planet. 



Benzenberg on a law of planetary dis- 

 tances, Gilb. XV. 169. 



On the progressive distances of the planets. 

 Zach. Mon. corr. VII. 74. 



Particular Planets. 



Mercury. 

 Wallot sur le passage deMercure. Ph.tr. 



1784. 312. 



Attributes a horizontal refraction of .276" to Mercury, 

 equivalent to 2fl".4 in time. 



Gibers on Schrbter's observations of Mercury. 



Zach. Mon. corr. I. 574. 



Schrotet thinks it revolves in 24h. or 24h. 5'. 

 Lalande on the motion of Mercury. M. Inst. 



V. 442. 



In the transit of Nov. 1802, Mr. Bugge could find no 

 traces of an atmosphere. Journ. R. I., I. 



Von Zach says, that the mean apparent diameter of 

 Mercury is not so much as 7", probably little more than 5". 



Venus. 



Bianchini Hesperi phaenomena. f. Ro:ti. 



1728. 



Ace. Ph. tr. 1729 XXXVI. 158. 



Makes the period of diurnal rotation 25 days. 



Lurcher Memoire sur Venus. 8. R. S. 

 Maskelyne. Ph. tr. 1768. 355. 



Distinct marks of an atmosphere, or of inflection, or of both. 



Wallot. Ph. tr. 1784.312. 



Attributes to Venas a horizontal refraction of .205", equi- 

 valent to 8" or o" in time. 



Schrbter on the atmosphere of Venus. Ph. tr. 



1792.309. Ph. M.I V. 



Asserts, that Venus has a twilight of more than 4° ; and 

 mountains 4 or 5 times as high as ours. 



Schroter iiberdie Venus. 4. Erfurt. 1793. 

 Schrbter's further observations on Venus. Ph. 



tr. 1795. 117. 



Seems to have made very numerous observations ; per- 

 sists in the rotation of 23h. 2i' ; says, that the mountains are 

 generally obscured by the atmosphere. 

 Schruters Aphroditographische fragmenten. 



4. Helmst. 1796. R. S. 

 Schrbter's plate of the height of the moun- 

 tains in the earth, the moon, and Venus. 



Journ. Phys. XLVIII. 459- 

 Herschel's observations on Venus. Ph. tr. 



1793. 201. 



Denies the existence of high mountains, and the accuracy 

 of Schroter's observations on this planet in general. Al- 

 lows that Venus revolves, and not slowly ; that its atmo. 

 sphere must be considerable, from the excess of its cusps 

 above a semicircle, which Schroter first observed ; but re- 

 marks, that Schroter, in considering it, has neglected the 

 effect of the sun's penumbra. Thinks Venus a little larger 

 than the earth : her disc appears brightest at the margin. 



Lalande on the motion of Venus. M. Inst. 

 ,V. 350. 



The Earth, in its relations to the Celestial 

 Bodies. 



Figure of the earth . See Geograph v. 

 Precession of the equinoxes.' See Laws of 



Gravity. 

 Gregory on the controversy of A ngelis and 



Riccioli, respecting the motion of the 



earth Ph. tr. 1668. III. 693. 



