x CONTENTS. 



APPENDIX. 



MEMBERS DECEASED, - _ Page 46. 



I. Biographical Account of William Lothian, D. D. _ .A*. 



II. Biographical Account of Sir George Clerk- Maxwell, Baronet, 51. 

 III. Biographical Account of Matthew Stewart, D.D. -- 57. 



LIST of DONATIONS prefented to the ROYAL SOCIETY of Edinburgh, 77. 



LIST of all the MEMBERS or FELLOWS of the ROYAL SOCIETY of 

 Edinburgh, . _ 83. 



Office-Bearers of the SOCIETY, 98. 



PART II. 

 PAPERS READ BEFORE THE SOCIETT. 



1. 



PAPERS OF THE PHYSICAL CLASS. 



I. Experiments on the Motion of the Sap in Trees . JJyDr John Walker, 3. 



II. The Theory of Rain. By Dr James Hutton, - 41. 



III. On the Caufes which affeft the Accuracy of Barometrical Mea- 



furements. By Mr John Playfair, - . 87. 



IV. On the Ufe of Negative Quantities in the Solution of Problems by 



Algebraic Equations. By Mr William Greenfield, - 131. 



V. Experiments and Obfervations upon a remarkable Cold which ac- 



companies the Separation of Hoar Frojl from a clear Air. By 

 Mr Patrick Wilfon, - _ I4 6. 



VI. An Account of the Method of making a Wine, called by the Tartars 



Koumifs ; with Obfervations on its ttfe in Medicine. y Dr 

 John Grieve, . 178. 



VII. 



