Reciprocal observations by the four-inch theodolite gave 

 185"4 feet for the height of Rover Crag above Caldberg Moor, 

 whence we get (1551-8 — 185*4 =)1366'4 for the altitude of 

 the latter ; or 2*8 feet less than by the measurement from Pen- 

 hill. The height of the Moor, as determined at Settronside 

 (1359*4) is rejected because the signal could not be satisfac- 

 torily identified. 



The wall on Whitfield Hill being about 5^ feet high, we 

 have 1345*4 feet for the altitude of the ground at the summit. 



My next will contain a few barometrical measurements and 

 geological notes made in Wensleydale and the Yorkshire por- 

 tion of Lunedale. 



Leeds, April 2, 1829. JoHN NixON. 



N. S. Vol. 5. No. 30. June 1829. 



3L 



LXV. Pro- 



