398 Mr, Greatorex’s observations on the heights 
forward between Armath waite and Bristow Hill, allowing 8 
inches for the earth's curvature : a small allowance appeared 
necessary for refraction, the object appearing rather lower 
than it ought to have been. (This was in the forenoon.) 
From Bristow Hill, by means of a middle station, a level 
was taken to Crow Park, close to the lake, and the measure- 
ment com pleated down to the mean height of Derwent 
Water. 
Results of the levelling. 
From the summit of Skiddaw to Applethwaite 
Down to the level of Bristow Hill 
Thence to the level of Crow Park 
Down to the average height of Derwent Water 
yds. 
900 
5 
ij. 
16 
ft. in. 
o o 
0 7 % 
2 5 
0 3 
Skiddaw above the lake - - 936 o 
Derwent Water above the sea at low-water mark, according to an 
accurate measurement by the late Mr. Crosth waite - 76 o o 
Height of Skiddaw by levelling - 1012 o 3§ 
Results of the several barometrical observations on the summit of 
Skiddaw , Sept. 15th. 1817, at 10 hours 50 min. a. m. 
inches. 
Barometer below. 10 yds. above the lake 30.050. Ther. 6i°. 
Barometer above - - 27.156. Th. attached 57 0 . Do. detached 50°. 
yds. 
Whence, by Dr. MasKelyne’s formula, the height - - = 926.1685 
Measured height - r= 926 
error -f .——.1685 
By Dr. Hutton’s formula - - 925.285 
error — .— — .715 
50 yards down. 12 h. 20 m. 
Bar. below - - 30.030. Ther. 62°. 
Do. above » - 27.310. Do. 5 6°.* yds. 
Measured height - - 876 
By Dr. Maskelyne - 873.194477 
error — • 2.805523 
By Dr. Hutton - error— 3948 
* The attached and detached thermometers did not differ for the remainder of 
the observations. 
