CHRONOLOGICAL TABLE OF HIS MEMOIRS. 267 



1787. Phil. Trans., vol. Ixxvii. Remarks on the new Comet. Dis- 

 covery of Two Satellites revolving round George's Planet. On Three 

 Volcanoes in the Moon. 



1788. Phil. Trans., vol. Ixxviii. On George's Planet (Uranus) and 

 its Satellites. 



1789. Phil. Trans., vol. Ixxix. Observations on a Comet. Cata- 

 logue of a Second Thousand new Nebulae and Clusters of Stars. 

 Some Preliminary Remarks on the Constitution of the Heavens. 



1790. Phil. Trans., vol. Ixxx. Discovery of Saturn's Sixth and 

 Seventh Satellites; with Remarks on the Constitution of the Ring, on 

 the Planet's Rotation round an Axis, on its Spheroidal Form, and on 

 its Atmosphere. On Saturn's Satellites, and the Rotation of the Ring 

 round an Axis. 



1791. Phil. Trans., vol. Ixxxi. On the Nebulous Stars and the 

 Suitableness of this Epithet. 



1792. Phil Trans., vol. Ixxxii. On Saturn's Ring, and the Rota- 

 tion of the Planet's Fifth Satellite round an Axis. Mixed Observa- 

 tions. 



1793. Phil Trans., vol. Ixxxiii. Observations on the Planet Ve- 

 nus. 



1794. Phil Trans., vol. Ixxxiv. Observations on a Quintuple Band 

 in Saturn. On some Peculiarities observed during the last Solar 

 Eclipse. On Saturn's Rotation round an Axis. 



1795. Phil Trans., vol. Ixxxv. On the Nature and Physical Con- 

 stitution of the Sun and Stars. Description of a Reflecting Telescope 

 forty feet in length. 



1796. Phil Trans., vol. Ixxxvi. Method of observing the Changes 

 that happen to the Fixed Stars; Remarks on the Stability of our Sun's 

 Light. Catalogue of Comparative Brightness, to deterrqine the Per- 

 manency of the Lustre of Stars. On the Periodical Star a Herculis, 

 witli Remarks tending to establish the Rotatory Motion of the Stars on 

 their Axes ; to which is added a second Catalogue of the Brightness of 

 the Stars. 



1797. Phil Trans., vol. IxxxviL A Third Catalogue of the compar- 

 ative Brightness of the Stars ; with an Introductory Account of an 

 Index to Mr. Flamsteed's Observations of the Fixed Stars, contained 

 in the Second Volume of the Historia Ccelestis to which are added 

 several useful Results derived from that Index. Observations of the 

 changeable Brightness of the Satellites of Jupiter, and of the Variation 

 in their apparent Magnitudes; with a Determination of the Time of 

 their rotary Motions on their Axes, to which is added a Measure of the 

 Diameter of the Second Satellite, and an Estimate of the comparative 

 Size of the Fourth. 



