46 



REPORT — 1856. 



JSfote. — Since the reading of the above paper before the British Association at 

 Cheltenham, Mr. Poole has been in Westmoreland, and taken the heights of several 

 mountains in the Lake District with the Aneroid Metallique. 



In the Table below, the first column shows the height by calculation, allowing 

 33'5 feet per millimetre as adopted by him in Palestine. The second column is cal- 

 culated by Delcros's formula, giving corrections for temperature and latitude. The 

 third column shows the heights furnished by Colonel James, Chief of the Ordnance 

 Survey of Great Britain, and which were obtained from him since the aneroid level- 

 lings were calculated. 



The Ordnance survey thus confirms most satisfactorily the correctness of the 

 aneroid, when corrected by Delcros's formula, up to a height of 3000 feet. 



Unfortunately the temperatures at the time of observation were not kept in Pales- 

 tine, and therefore Delcros's formula cannot be now used for those readings, and 

 the heights given in the original paper are proportionally too low 

 Levellings by Aneroid Metallique in the Lake District, taken from Iveing Cottage, 



Ambleside, which is calculated at 80 feet above Windermere Lake (128 feet above 



the sea by Colonel James), or Station at 208 feet above the sea. September 1856. 



Levellings liy calculation, 33'5 feet per millimetre, with 208 feet 

 added for height of Station above the sea. 



Delcros's 

 Formula. 



Colonel 

 James's 

 Ordnance 



Survey. 



Helvellyn 



Fairfield 



Highstreet 



Wansfell (not quite at top, 30 feet assumed) ... 



Kirkstone pass, boundary line 



House at ditto 



Loughrigg Fell, or Ewe Crag 



2734 

 2506 

 2452 

 1524 

 1400 

 1,383 

 1032 



3056 

 2837 

 2693 

 1649 

 1487 

 1470 

 1123 



3117 

 2861 

 2722 

 1598 

 1466 



1101 



-61 

 -24 



-29 

 +51 

 +21 

 + 4 

 +22 



