Part 38

1780. Philosophical Transactions, vol. lxx.--Astronomical Observations on the Periodical Star in the Neck of the Whale.--Astronomical Observations relative to the Lunar Mountains.

1781. Phil. Trans., vol. lxxi.--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. lxxii.--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. lxxiii.--Letter to Sir Joseph Banks on the Name to be given to the new Planet.--On the Diameter of the Georgium 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 Diameter 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., lxxvi.--Catalogue of a Thousand Nebulae and Clusters of Stars.--Researches on the Cause of a Defect of Definition in Vision, which has been attributed to the Smallness of the Optic Pencils.

1787. Phil. Trans., vol. lxxvii.--Remarks on the new Comet.--Discovery of Two Satellites revolving round George's Planet.--On Three Volcanoes in the Moon.

1788. Phil. Trans., vol. lxxviii.--On George's Planet (Uranus) and its Satellites.

1789. Phil. Trans., vol. lxxix.--Observations on a Comet. Catalogue of a Second Thousand new Nebulae and Clusters of Stars.--Some Preliminary Remarks on the Constitution of the Heavens.

1790. Phil. Trans., vol. lxxx.--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. lxxxi.--On the Nebulous Stars and the Suitableness of this Epithet.

1792. Phil. Trans., vol. lxxxii.--On Saturn's Ring, and the Rotation of the Planet's Fifth Satellite round an Axis.--Mixed Observations.

1793. Phil. Trans., vol. lxxxiii.--Observations on the Planet Venus.

1794. Phil. Trans., vol. lxxxiv.--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. lxxxv.--On the Nature and Physical Constitution of the Sun and Stars.--Description of a Reflecting Telescope forty feet in length.

1796. Phil. Trans., vol. lxxxvi.--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 determine the Permanency of the Lustre of Stars.--On the Periodical Star a Herculis, with 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. lxxxvii.--A Third Catalogue of the comparative 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 Coelestis 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.

1798. Phil. Trans., vol. lxxxviii.--On the Discovery of Four additional Satellites of the Georgium Sidus. The retrograde Motion of its old Satellites announced; and the Cause of their Disappearance at certain Distances from the Planet explained.

1799. Phil. Trans., vol. lxxxix.--A Fourth Catalogue of the comparative Brightness of the Stars.

1800. Phil. Trans., vol. xc.--On the Power of penetrating into Space by Telescopes, with a comparative Determination of the Extent of that Power in Natural Vision, and in Telescopes of various Sizes and Constructions; illustrated by select Observations.--Investigation of the Powers of the Prismatic Colours to heat and illuminate Objects; with Remarks that prove the different Refrangibility of radiant Heat; to which is added an Inquiry into the Method of viewing the Sun advantageously with Telescopes of large Apertures and high magnifying Powers.--Experiments on the Refrangibility of the Invisible Rays of the Sun.--Experiments on the Solar and on the Terrestrial Rays that occasion Heat; with a comparative View of the Laws to which Light and Heat, or rather the Rays which occasion them, are subject, in order to determine whether they are the same or different.

1801. Phil. Trans., vol. xci.--Observations tending to investigate the Nature of the Sun, in order to find the Causes or Symptoms of its variable Emission of Light and Heat; with Remarks on the Use that may possibly be drawn from Solar Observations.--Additional Observations tending to investigate the Symptoms of the variable Emission of the Light and Heat of the Sun; with Trials to set aside darkening Glasses, by transmitting the Solar Rays through Liquids, and a few Remarks to remove Objections that might be made against some of the Arguments contained in the former paper.

1802. Phil. Trans., vol. xcii.--Observations on the two lately discovered celestial Bodies (Ceres and Pallas).--Catalogue of 500 new Nebulae and Clusters of Stars, with Remarks on the Construction of the Heavens.

1803. Phil. Trans., vol. xciii.--Observations of the Transit of Mercury over the Disk of the Sun; to which is added an Investigation of the Causes which often prevent the proper Action of Mirrors.--Account of the Changes that have happened during the last Twenty-five Years in the relative Situation of Double Stars; with an Investigation of the Cause to which they are owing.

1804. Phil. Trans., vol. xciv.--Continuation of an Account of the Changes that have happened in the relative Situation of Double Stars.

1805. Phil. Trans., vol. xcv.--Experiments for ascertaining how far Telescopes will enable us to determine very small Angles, and to distinguish the real from the spurious Diameters of Celestial and Terrestrial 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. xcvi.--On the Quantity and Velocity of the Solar Motion.--Observations on the Figure, the Climate, and the Atmosphere 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.--Observations 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.