BIBLIOGRAPHY OF HERSCHEL's WRITINGS. G13 



SuBjECT-IxDEX. Philosophical Traksactions. Year. Page. 



Enceladiis : observations 1790 463 



Errata: in Flamsteed'S catalogue 179G 212 



Error in estimating the centre of a circle 1781 135 



Errors : in determining rotation of planets 1781 134-5 



: in determining parallax of stars considered '. 1782 86 



: of the Lamp Micrometer 2°-30 and 0".l from three measures 1782 112. 



: of the measures of double stars 1782 112 



: in the positions given by the sweeps 1786 4G4 



: of Herschel's double star measures 1803 347 



Ether: see Resisting Medium. 



Evolution : of sidereal forms 1789 226 



.Eye : causes of increased sensibility 1800 53 



: limit of natural vision 1 800 58, 59 



: limits of natural vision 1817 313 



: extent of telescopic vision 1817 318 



Eye-piece: for viewing the sun 1801 361 



Eye-pieces : single better than double 1782 95 



: trial of concave ones 1794 58 



: ofthe40-foot 1795 409 



: used for solar observation, described 1803 215 



: single and double : their relative value 1815 297 



Fabricius (D.) 1780 333 



Faculai : are elevations 1795 56 



Ferguson: 1780509-12 



Fixed Stars : see Stars. 



Flames : are penetrable to rays of light 1800 50 



Flamsteed : 1782 84 



: his star magnitudes l~96 170 



Flamsteed'S magnitudes : are very inconsistent 1796 458 



Flamsteed'S observations of fixed stars : Index to them 1797 293 



Galileo: 1780509-12 



1782 1 ^^ 



''''- 88 

 1795 47 



Gauging : see Star-gauging. 



Georgium Sidus : named .- VS'6 1 



: see Uranus. 



Goodericke : l*^*^ 1 ' ' 



Gravitv : there may be other central forces 1~'39 220 



Hadley : 



Harding's asteroid : {Juno) . 

 Head of a Comet : definition . 

 Heat: radiant; in general... 



(radiant; is of diflerent refrangibility 



(radiant) is reflected 



(radiant) it is also refracted •- 



Herschel, Carolina: 



