202 HERSCHEL. 



Some details on the real diameter of Mars, and on its atmosphere. — Analysis of some 

 observations on the constitution of the heavens. 



1785. Phil. D-ans., vol. Ixxv. — Catalogue of double stars. — On the constitution of the 

 heavens. 



1786. Phil. Trans., vol. Ixxvi. — Catalogue of a thousand nebulse and clusters of 

 stars. — Eesearchcs on the cause of a defect of definition in vision, which has been at- 

 tributed to the smallness of the ojitic pencils. 



1787. Phil. Trans., vol. Ixxvii. — Remarks on the new comet. — Discovery of two 

 satellites revolving round George's Planet. — On th ree volcanoes in the moon. 



1788. Pliil. Trans., vol. Ixxviii. — On George's Planet (Uranus) and its satellites. 



1789. Pltil. Trans., vol. Ixxix.— Observations on a comet. — Catalogue of a second thou- 

 sand new nebulas 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 riug, 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 riug round an axis. 



1791. Phil. Trans., vol. Ixxxi. — On the nebulous stars and the suitableuess of this 

 epithet. 



1792. Pltil. Trans., vol. Ixsxii. — On Saturn's ring, and the rotation of the planet's 

 fifth satellite round an axis. — Mixed observations. 



1793. Phil. Trans., vol. Ixxxiii. — Observations on the planet Venus. 



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 constitution 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 determine the permanency of the luster 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. Ixxxvii. — A third catalogue of the comparative brightness of 

 the stars ; with an introductory account of an index to Mr. Flamstecd's observations of 

 the fixed stars, contained in the second volume of the Plistoria Crolestis, to which are 

 added several useful results derived from that index. — Observations of the changeable 

 brightuess of the satellites of Jupiter, and of the variation in their apparent magni- 

 tudes ; 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 com- 

 parative size of the fourth. 



1793. Phil. Trans., vol. Ixxxviii. — On the discovery of four additional satellites of the 

 Georgium Sidus. The retrograde motion of its satellites .announced ; and the cause of 

 their disappearance at certain distances from the planet explained. 



1799. Phil. Trans., vol. Ixxxix. — 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 construction ; illustrated by select observations. — In- 

 vestigation of the powers of the prismatic colors to heat raid 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 in- 

 visible rays of the suu. — Experiments on the solar and on the terrestrial rays that occa- 

 sion 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 v/hether they are the same 

 or different. 



