^4 Mr. Nixon on the [Fes'. 



difference of level will be equal to the product added to the alti- 

 tude at 0° F. 



When the height of the detached thermometer is given only 

 for the upper station, multiply it by 2, and consider the product 

 as the sum of the thermometers. Correct for latitude, and 

 augment the resulting difference of level by the quantity given 

 in Table VI.; or divide the approximate altitude by 500, and add 

 to it the square of the remainder. 



Examples, 



(No. I.) Gearstones Inn. (Lat. 55°) Cam Fell. 



29-086 (46) 45^^ 28- 1 88 (43) 42° 



834-5 Altitude in feet of Cam Fell* above Gearstones Inn. 



(No. 2.) Horton Bridge. (Lat. 55°) Pen-y-gent. 



28-686 (46) 27-088 (35) 33° 



758*7-5 6190-0 



x2 



6-0 7-0 m 



116-5 140-5 -ILat. 



7709-0 6337-5 65 



6337-5 



1371-5 Difference of altitude at 0°F. 

 107-0 = 1371-5 X 65 X -0012 



1478-5 



8-5 See Table II. 



1487-0 feet. Altitude of Pen-y-gent above the Ribble at 

 Horton Bridge. 



Subjoined are given a few observations by Shuckburgh, Roy, 

 &c. with the heights calculated by the tables, and determined 

 trigonometrically, or by levelhng. 



• Seven miles from Ingleton on the Hawes road ; Cam Fell is nearly four miles 

 ENE of Cfearstones ; the station on the loftiest point (limestone) is over Cam-bouses. 



