614 BIBLIOGRAPHY OF HERSCHEL's WRITINGS. 



Subject-Index. Philosophical Tkaxsactions. Tear. Page. 



Herschel, Carolixa: 1795 396 



: 1797 293 



: 1807 264 



Herschel, John : 1808 160 



Herschel, William : tbe analysis of Ms paper of 1811 aa made by himself 1811 269 



Hevelius: 1780 508 



: 1795 47 



Hooke: 1782 84 



lustrumeuts : Quadrant used : 1781 121 



: Camera eye-piece 1782 176 



: see Micrometers, Telescopes, etc. 



Irradiation: 1790 479 



Japetus : observations 1790 432 



: is of variable brightness 1792 13, 14 



: rotates and revolves in the same period 1792 14 



: revolves on its axis in 79 days, 7 hours, 47 minutes 1792 16 



: nature of its surface 1792 17 



: observations from 1791, September 25 to October 1 1792 17 



— ; : its atmosphere is probably rare 1792 17 



: rotates on its axis 1796 456 



Jupiter : drawings of 1781 ) 



^ ^ < 123 



Jxipitcr 8 Tot&tio-a.: 1781 



118 

 124 



Jupiter^s satellites : their changeable brightness, and their magnitudes. .. 1797 332 



: rotate on their axes, and are of irregular shape or reflecting 



power 1797 344 



/ 334 



: theircolor 1797^ 349 



( 350 



Jupiter'' s spots change their places 1781 116 



Jupiter's spots gradually rotate in less time 1781 126 



Keill: his theory of variable stars 1780 344 



: 1780509-12 



Lacaille: 1796 172 



Lalande: ^ 1780509-12 



1783 283 



1796 177 



has shown the probability of a solar motion 1805 235 



Lambert-: suggested a solar motion 1805 235 



Lamp micrometer : described 1782 163 



Limiting apertures: 1817 311 



Long: 1782 88 



Lunar eclipses, mountains, etc. : see Moon. 



Magnifying power proper to be used 1782 92 



Magnifying power used ( 1782) 1782 < 



( 171 



: its effect on the darkness of the field of view 1785 82 



: must exceed a given Hmit in order to utilize the aperture. . . 1800 55 



Magnifying power (effective): defined 1815 294 



