620 BIBLIOGRAPHY OF HERSCHEL'S WRITINGS. 



Subject-Index. Philosophical Transactions. Tear. Page. 



Stars : spurious diameters 1785 48 



: the colors of double stars might possibly tell us which comijoncnt 



was the nearer 1785 48 



: their atmospheric sjjectra 1785 83 



: are suns 1789 213 



: may be regenerated from nebulae 1791 86 



: disapj)earance of 55 HereuUs 1792 26 



: their nature 1795 46 



: their analogies with our sun 1795 68 



: are not of eqiial size nor equably distributed 1796 168 



: rotate on their axes 1796 455 



: their relative sizes 1800 59 



: their distribution in space 1800 61 



: classification of stellar systems : as Insulated ; Binary ; Multiple ; 



Clustering Stars ; Groups ; Clusters 1802 478 



: their spurious diameters 1803 345 



: different kinds of motion of stars 1805 236 



: that have a projier motion may have a rotation on their axes 1805 326 



: cause of their proper motions 1806 225 



: their spectra 1814 264 



: their evolution 1814 251 



: their distribution in space 1817 303 



: catalogues. See Catalogues. 



Sun: eclipse of 1778, June 24, observed 1781 138 



: may be in motion 1782 103 



: is probably in motion 1782 143 



260 

 261 



moves towards R. A. 257° 1783 268 



is near the centre of the Milky Way 1784 443 



the sun is situated in a compound nebula of Form III 1785 244 



eclipse of 1793, September 5 1794 39 



its nature 1795 46 



early theories 1795 48 



must be wasted by emitting light 1795 60 



height of its lucid envelope 1795 62 



may be inhabited 1795 63 



its lucid substance is neither liquid nor gaseous 1795 71 



changes in the sun's he^t will account for changes in terrestrial 



climates 1796 186 



its disk cannot appear equally bright all over ) 



^ ° ( 1800 51 



advantages of viewing it with large apertures, etc 1800 255 



confirmation of previous theory advanced by Herschel 1801 265 



nomenclature of its various parts 1801 267 



its atmosphere 1801 300 



its spots change, and this change is connected with changes in the 



price of wheat 1801 310 



our sun is an insulated star 1802 479 



direction and velocity of its motion 1805 233 



reasons for admitting a solar motion 1805 234 



the quantity and velocity of its motion 1806 205 



it is a member of a very extensive sidereal system 1806 236 



its eftect on comets 1812 136 



its prof)er motion discriminated 1783 



