BIBLIOGRAPHY OF HERSCHEL's WRITINGS. G13 



Subject-Index. PuiLoeormcAL Tkansactions. Yoar. Page. 



Enceladu8 : observations 17iKi Aiui 



Errata: in Flamsteed's catalogue 179(3 212 



Error in estimating the centre of a circle IT^l Hi.') 



Errors: in determining rotation of planets IT-^l i:!!-.''} 



: in determining parallax of stars considered 17H'.i -t; 



: of the Lamp Micrometer 2°-;P and 0".l from three measures 1782 ll'i 



: of the measures of double stars 17&2 1 12 



: in the positions given by the sweeps 178(3 4()4 



: of Hekschel's double star measures 180;5 'M~ 



Ether: see Resisting Medium. 



Evolution : of sidereal forms 1789 22(5 



Eye : causes of increased sensibility 1800 03 



: limit of natural vision 1800 58, 59 



: limits of natural vision 1"^17 'M'i 



: extent of telescopic vision 181" ^^18 



Eye-piece : for viewing the sun liSOl 361 



Eye-pieces : single better than double 1"*- 95 



: trial of concave ones 179A 58 



: ofthe40-foot 1~9-'' 409 



: used for solar observation, described 1803 21:) 



: single and double : their relative value 1815 297 



Fabricius(D.) 1~^0 333 



FaculoB : are elevations 1""^ 5" 



Ferguson: 1780509-12 



Fixed Stars : see Stars. 



Flames : are penetrable to rays of light I'^OO 50 



17S'> 84 

 Flamsteed: ^_ - ^ 



: his star magnitudes ^ ' -'*' ^ ' " 



Flamsteed's magnitudes : are very inconsistent 1"'^^' 458 



Flamsteed's observations of fixed stars : Index to them 1~9~ ~93 



Galileo: 1780509-12 



1782^ li 



. 1795 47 



Gauging : see Star-gauging. 



Georgiam Sidus : named "^ 



: see Uranus. 



179(5 177 



Goodericke: 



Gravity : there may be other central forces 1 "--' 



. 1792 9 



Hadley: 



• 1 / r \ .. 180o 31 



Harding s asteroid: {Juno) 



Head of a Comet : definition ^*^^ ^^ 



Heat: radiant; in general ^^^^ ^^ 



• ISOO 293 



• ' ' 1800 437 



■• 1801 265 



■ !!.!..-.-.".. 1^01 354 



: (radiant; is of different refrangibility J^j^,^ ^J^ 



: (radiant) is reflected ^"^^^ ^^^ 



: (radiant) it is also refracted ^.^^^ ^3 



Herschel, Carollna: 



