of IngleborougJi above the Greeta at Ingleton. 169 



of the Kingsdale and Chapel-le-dale streams (a distance o* 

 150 yards,) was ascertained by the levelling staff and sector 

 to be 11-93 feet. 



The data, now complete, are presented so arranged as to 

 exhibit at one view the final process of calculation. 



Feet.Tenths. 

 Hunt's Cross above church pinnacle 683*701 _ 



Pinnacle above base at north end 91*03J 



Hunt's Cross above church tower top 687*50 \ 774,. 71 



Tower above base at north end 87*21 J* 



Hunt's Cross above church tower ledge 693*80 

 Ledge above base at north end 80*80 



J I ... 774*60 



Hunt's Cross above ground at north end of base ... 774*68 



North end of base above south end 19*90 



South end of base above spring of arch 6*44? 



Hunt's Cross above spring of arch 801*02 



Ingleborough above Hunt's Cross 1200*70 



Ingleborough above spring of arch of Thornton bridge200 1 *72* 

 Fall from arch to confluence of the two streams,^ 

 or head of the Greeta J 



Ingleborough above the Greeta 2013*65 



The height of Whernside above the Greeta will be 2056, 

 and that of Hunt's Cross 8*13 feet. Reciprocal observations 

 at Ingleborough and Whernside give 41*3 for their difference 

 of level, or one foot less than by the measurements at Hunt's 

 Cross. At the latter place the signal on Whernside did not, 

 however, appear of its usual height, the ground in front of it 

 probably intercepting the view of its base. 



Possible Errors of Measurement. — Admitting the angles ob- 

 served for the distances liable to an error of 10" each, we 

 may make the distance from Hunt's Cross to Ingleborough 

 tower side 17623 instead of 17621 feet, and that to the church 

 tower 8137*5 instead of 8135*7. Now increase their corre- 

 sponding vertical angles 10" each, and we shall get an aug- 

 mentation in the height of Ingleborough above the church of 

 1*5 foot. If we omit the correction for refraction, we add 

 6 inches to the error, now become 2 feet. There cannot well 

 be any material error in the height of the church above tho 



• Thornton bridge would be an excellent inferior station for measure- 

 ments by the barometer of the height of Ingleborough, Whernside, Hunt's 

 Cro;s anrl Greygreth. 



Third Series. Vol. 4. No. 21. March 1834. Z 



