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. 1xx.—Astronomical Observa- 
tions on the Periodical Star in the Neck of the Whale.—Astronomical 
Observations relative to the Lunar Mountains. 
1781. Phil. Trans., vol. 1xxi.—Astronomical Observations on the 
Rotation of the Planets on their Axes, made with a View to decide 
whether the Daily Rotation of the Earth be always the same.—On the 
Comet of 1781, afterwards called the Georgium Sidus. 
1782. Phil. Trans., vol. xxii.—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. 
17838. Phil. Trans., vol. lxxiii—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. lxxiv.—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. lxxv.—Catalogue of Double Stars.—On the 
Constitution of the Heavens. 
1786. Phil. Trans. vol., 1xxvi—Catalogue of a Thousand Nebule 
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.— Ty-anslator’s Note. 
