256 



Mr. J. Nixon on the Trigonometrical Height 



N.B. Angles by the circle are marked C, and those on 

 the repeating principle by the theodolite T, the figures af- 

 fixed denoting the multiple of repetition. Horizontal angles 

 by the theodolite are marked t, with the number of observa- 

 tions affixed. The figure is omitted when the angle has been 

 obtained merely by the addition or difference of other angles. 

 The difference between 180° and the sum of the observed 

 angles of a triangle is given within brackets. The rational 

 mean of a distance derived from different bases is stated 

 the last column. 



in 



In<rleborou<rh to 



I'he Calf to 



Horizontal Distances, 



The Calf 77614-5ft.n 



Rossal Landmark 166545- 



Black Comb 201970- 



Lancaster church tower 97174- 



Ditto 131605-5 



Rossal Landmark 199862* 



I -5 CO 



I o c 



Triangles, 



I, 



Ingleborough 

 The Calf .... 



Warton Crag 



o / 



75 54 

 54 5 



50 



82053-8 ft. 



IV. 



Ingleborough ... 

 Rossal Landmark 

 Farleton Knot... 



47 47 

 22 37 



H 



109 35 49^ 



C20 





 Cl6 



67989-0 ,67990 

 130932-7 



Hence the distance from the Calf to Rossal Landmark will 

 be 199863 or 1 foot in excess. 



* The cipher denotes that the angle was not measured, but obtained by 

 subtracting the sum of the two others from 180°. 



