CONTENTS. 



Page 

 AuT. I. Remarks on the Scenery, Antiquities, Population, 

 Agriculture, and Commerce of Central European 

 Turkey. By Dr A. Boue'. Communicated by the 

 Author in a Letter to the Editor. (Concluded 

 from p. 131.) . . 237 



II. On the Cause of the Temperature of Hot and Ther- 

 mal Springs ; and on the bearings of this subject, 

 as connected with the general question regarding 

 the Internal Temperature of the Earth. By Pro- 

 fessor GusTAV BiscHOF of Bonu. Communicated 

 by the Author. (Concluded from p. 164.) 252 



Chap. XVIII — In what proportion to the height ahove 

 the lowest points of the Earth's surface is the decrease 

 of the Temperature of the Air and of the Soil ? and is 

 this Decrease the same at all parts of the Earth ? 252 



Chap. XIX — What Conclusions may be drawn from the 

 Observations hitherto made on the Increase of Tempera- 

 ture towards the Interior of the Earth ? . 284 

 Chap. XX. — Can the Progi-ession of the Increase of Tern- 

 perature towards. the centre of the Earth be with cer- 

 tainty deduced from the Temperature of Artesian 

 Springs, and the depth from which they rise ? . 293 

 Table of the Temperatures of Springs, . 296 

 III. Remarks on the Geographical Position of some Points 

 on the West Coast of Scotland. By William 

 Galbraith, M. a., Teacher of Mathematics, 

 Edinburgh, M. S. A. Communicated by the So- 

 ciety of Arts, . . . 300 



