CHRONOLOGICAL TABLE OF HIS MEMOIRS. 269 
tinguish the real from the spurious Diameters of Celestial and Terres- 
trial Objects: with an Application of the Result of these Experiments to 
a Series of Observations on the Nature and Magnitude of Mr. Harding’s 
lately discovered Star.—On the Direction and Velocity of the Motion 
of the Sun and Solar System.—Observation on the singular Figure of 
the Planet Saturn. 
1806. Phil. Trans., vol. xcvii—On the Quantity and Velocity of the 
Solar Motion.—Observations on the Figure, the Climate, and the At- 
mosphere of Saturn and its Ring. 
1807. Phil. Trans., vol. xcvii—Experiments for investigating the 
Cause of the Coloured Concentric Rings, discovered by Sir Isaac 
Newton between two Object-glasses laid one upon another.—Observa- 
tions on the Nature of the new celestial Body discovered by Dr. 
Olbers, and of the Comet which was expected to appear last January 
in its Return from the Sun. 
1808. Phil. Trans., vol. xcviii—Observations of a Comet, made with 
a view to investigate its Magnitude, and the Nature’of its Illumination, 
To which is added, an Account of a new Irregularity lately perceived 
in the Apparent Figure of the Planet Saturn. 
1809. Phil. Trans., vol. xcix.—Continuation of Experiments for in- 
vestigating the Cause of Coloured Concentric Rings, and other Ap- 
pearances of a similar Nature. 
1810. Phil. Trans., vol. c.—Supplement to the First and Second 
Part of the Paper of Experiments for investigating the Cause of Col- 
oured Concentric Rings between Object-glasses, and other Appear- 
ances of a similar Nature. 
1811. Phil. Trans., vol. cii—Astronomical Observations relating to 
the Construction of the Heavens, arranged for the Purpose of a criti- 
cal Examination, the Result of which appears to throw some new 
Light upon the Organization of the Celestial Bodies. 
1812. Phil. Trans., vol. cii.—Observations of a Comet, with Re- 
marks on the Construction of its different Parts.—Observations of a 
Second Comet, with Remarks on its Construction. 
1814. Phil. Trans., vol. civ.—Astronomical Observations relating to 
the Sidereal Part of the Heavens, and its Connection with the Nebu- 
lous Part; arranged for the Purpose of a critical Examination. 
1815. Phil. Trans., vol. cv.—A Series of Observations of the Satel- 
lites of the Georgian Planet, including a Passage through the Node of 
their Orbits; with an Introductory Account of the Telescopic Appa- 
ratus that has been used on this Occasion, and a final Exposition of 
some calculated Particulars deduced from the Observations. 
1817. Phil. Trans., vol. cvii.—Astronomical Observations and Ex- 
periments tending to investigate the Local Arrangement of the Celes- 
