28 



HISfORT of the SOCIETY. 



1784. Eflay itfelf, or any abftracl of it, fhould appear in this volume 

 of the Society's TranfadUons. 





Dec. 6. 



the 



Mr Fleming on 

 Loch Tay. 



Mr Wilfon on 

 the folar fyftem. 



A GENERAL meeting was held for th'e election of the Office- 

 bearers of the ClafTes. [See the Lift fubjoined to Part I. of 

 this volume.] 



Phyf. CL Dr WALKER read the concluding part of his 

 paper on the Motion of the Sap in Trees, which is publimed in 

 this volume. [No. I. Phyf. Cl.~\ 



THE Reverend Mr PLAYFAIR read a letter from the Reve- 

 rend Mr THOMAS FLEMING, Minifter of Kenmore, giving an 

 Account of an unufual Agitation in the Waters of Loch Tay, on 

 the 1 2th of September laft. The letter is publimed in this vo- 

 lume. [No. VIII. Phyf. <7/.] 



Mr JOHN ROBISON, General Secretary, informed the Society, 

 that, a few days ago, Mr JAMES RUSSELL, one of the members, 

 had offered to him the perufal of a paper, written by a friend, 

 and containing fome thoughts on a method for difcovering by 

 obfervation, whether the centre of the Solar Syftem was in mo- 

 tion ; with other interefting matters in aftronomy. Mr ROBI- 

 SON, recolledling that Mr PATRICK WILSON, afllftant Profeflor of 

 Aftronomy at Glafgow, had long ago communicated to him in 

 converfation, fome curious fpeculations on this fubject, told Mr 

 RUSSELL, that, before perufing his friend's paper, he would 

 write an account of what he could recolledl of Mr WILSON'S 

 fpeculation on that fubjecl. This account he now laid before 

 the Society, in order to afcertain the title to originality or 

 priority, in any thing which may have occurred to both of 

 thefe Gentlemen. 



THE fum of this account is, That about the year 1767 or 

 1768, Mr WILSON entertained an opinion that the aberration 



of 



