LEVEL OF THE BALTIC. 



401 



It is not demonstrated that the numbers of the last 

 column represent exactly the lowering of the water in a 

 century ; for it has not yet been sufficiently determined 

 if this lowering be uniform, or if it vary at different pe- 

 riods, and if it depend upon some local circumstance, 

 upon the climate, or upon the state of the atmosphere. 

 Nor is it properly established, that this lowering, which 

 becomes less perceptible from the north of the Baltic, un- 

 til it disappears entirely at the southern extremity, fol- 

 lows precisely the same law of diminution as the lati- 

 tude. It appears to be uniform in the whole extent of 

 the Gulf of Bothnia, and it rises about four feet and a 

 quarter in that region ; at Cahnar (lat. 57 5(X) it is on- 



c c 



