266 HERSCHEL. 



where his father achieved such immortal labours, by a 

 monument more expressive in its simplicity than pyra 

 mids or statues. 



CHRONOLOGICAL TABLE 



OF THE MEMOIRS OF WILLIAM HERCHEL.* 



1780. Philosophical Transactions, vol. Ixx. Astronomical Observa 

 tions on the Periodical Star in the Neck of the Whale. Astronomical 

 Observations relative to the Lunar Mountains. 



1781. Phil.Trans., vol. Ixxi. Astronomical Observations on the 

 Rotation of the Planets on their Axes, made with a View to decide 

 whether the Daily Kotation of the Earth be always the same. On the 

 Comet of 1781, afterwards called the Georgium Sidus. 



1782. Phil. Trans., vol. Ixxii. On the Parallax of the Fixed Stars. 

 Catalogue of Double Stars. Description of a Lamp Micrometer, and 

 the Method of using it. Answers to the Doubts that might be raised 

 to the high magnifying Powers used by Herschel. 



1783. Phil. Trans., vol. Ixxiii. Letter to Sir Joseph Banks on the 

 Name to be given to the new Planet. On the Diameter of the Georg 

 ium Sidus, followed by the Description of a Micrometer with luminous 

 or dark Disks. On the proper Motion of the Solar System, and the 

 various Changes that have occurred among the Fixed Stars since the 

 Time of Flamsteed. 



1784. Phil. Trans., vol. Ixxiv. On some remarkable Appearances 

 in the Polar Regions of Mars, the Inclination of its Axis, the Position 

 of its Poles, and its Spheroidal Form. Some Details on the real Diam 

 eter of Mars, and on its Atmosphere. Analysis of some Observations 

 on the Constitution of the Heavens. 



1785. Phil Trans., vol. Ixxv. Catalogue of Double Stars. On the 

 Constitution of the Heavens. 



1786. Phil. Trans, vol., IxxvL Catalogue of a Thousand Nebulas 

 and Clusters of Stars. Researches on the Cause of a Defect of De 

 finition in Vision, which has been attributed to the Smallness of the 

 Optic Pencils. 



# These titles are copied direct from the Philosophical Transactions, 

 instead of being retranslated. Translator s Note. 



