262 Altitudes of Mount aiiis, Si-c. visihlefrom 



The jiltltude of Great Wiiernside was determined from 

 Rumbles Moor, Flasby Fell, Pendle Hill, and Ingleborough. 



Rumbles Moor has been found to be 975 feet above the 

 canal at its soiiLli base; or 1318 teet above low water at Liver- 

 pool. 



Flasby Fell, as determined by a trigonometrical ojieration 

 from adjacent stations, is 8G20 feet from a bridge across the 

 same canal. The observed depression was 5° 17 '1'9", and the 

 elevation 5°16'33"; the fall is consequently 798^ teet; the 

 bridoe is 16^- feet above the canal, and the latter 355 feet high. 

 Hence the altitude of the fell is 1170 feet. 



Pendle IIh.l was observed to be 1823 feet above the sea 

 near Lythani, September 2+, 1821, at 0'' 20"^ p. m. The fall 

 to low water would be about eight feet, giving 1831 feet for 

 the altitude of the hill. 



At Ixgleborough, June 14, 1822, at 4'' p. M. very careful 

 observations of the depression of the sea in front of Peel Castle 

 gave 2380 feet for the height of the mountain above low water, 

 at 3'' 1 5'"; the observation being made from the old building to 

 the W.S.W. deternuned the altitude at 2385 feet. At 2'' 50"" 

 p. M. the depression of the sea, apparejitlij at the same distance 

 as the Castle, gave 2371 feet for the altitude. Lancaster church 

 tower was determined to be 21425 ^^et below the highest part 

 of the mountain*. The tower is 155 feet 3 inches above the 

 canal at Hest Bank, at which place the fall to the channel of 

 tlie river Keer at low water, January 29, 1823, was found by 

 levelling to be 76 feet 6 inches. At Glasson dock, S.W. of 

 Lancaster, the canal is considered to be 80 teet above low wa- 

 ter mark at spring tides. — If we call it 78 feet, the consequent 

 altitude of Ingleborough will be 237G, and the mean of the 

 four observations will be 2378 feet. June 13th at 5'' 5'" p. M. 

 the nearest point of Chajiel Lsle (near L'^lverston) was observed 

 from the station to be depressed 68' 37" ; and on the 17th at 

 11" A. M. 68' 32" — distance not yet ascertained. I have sup- 

 jiosed high water to take place at Peel Castle at 5'' 13™ p. M. 

 and that it would be 25 leet above lo-va water mark. At Hest 

 Bank the fall was 291 feet, and the time oi'high water 0'^ 44'" 

 p. >r. 



For the distances from Ingleborough Station to Lancaster 

 Church, to Peel C'astle, and to the Old Building, see Trig. 

 Survey? Vol. III. The distance from the castle to the shore 

 was calculated at 1 50 feet. 



The differences of altitude of Great Whernside and the four 



* I am indebted to an iiitelli^iient surveyor in Lancaster for the determi- 

 nation of the fall from the tower to the sea, 



stations 



