of the Sun and Solar Syjlem, 
nefs, tbofe that are mod likely, on that account, to be affected 
by a parallax arifmg from the motion of the folar fyftem, are 
the very ftars which, by mayer’s own table, I have made ufe 
of to point it out to us *. 
Datchct, March 13, 1783. 
* I have lately been favoured by Dr. wilson, Profefior of Aftronomy at Glaf- 
gow, with a fliort tra£I, called, “ Thoughts on general Gravitation, and Views 
4 ‘ thence arifing as to the Rate of the Univerfe j” wherein the poffibility of a 
Solar Motion is alfo fhewn. It was printed in 1777. Mr. de la lande, in the 
Memoirs for 1776, with his ufual felicity of thought, has inferred the probable 
motion of the fyftem from the fun having a rotation round his axis, when he 
fays, p. 513, “ Une force quelconque imprimee a un corps, et capable dele 
“ faire tourner autour de fon centre, ne peut manquer auffi de deplacer le centre^ 
“ et 1’on ne fauroit concevoir l’un fans l’autre. II paroit done tres-vraifemblable 
“ que le foleil a un mouvement reel dans l’efpace abfolu,” &c. 
