Mr. Winch on the Geology of the Banks of the Tweed. 85 



whence we derive the time of the moon's passage over the 

 meridian in sidereal time thus : 



0-01897 



1-82031 



0-02193 



1-86121 = 72"-65 



The quantities m, is and 8 must be interpolated by the me- 

 ridian difference from Berlin. For the greater accuracy of 

 these and other reductions, the quantity TT has been accurately 

 interpolated, and expressed in tenths of seconds for the time of 

 the culmination in the tables headed ' Auxiliary Tables for 

 the Occultations of Stars.' 



Finally, I beg leave to observe that for the more easy distinc- 

 tion of the inferior culminations of the moon, the letter U has 

 been entirely omitted ; and that, for the same reason, to the 

 marks of the moon's quarters the following letters have been 

 added : 



N. M. (the initials of the German words for) New Moon. 



OE. V First Quarter. 



0V. M Full Moon. 



O L. V Last Quarter. 



XIV. Remarks on the Geology of the Banks of the Tweed,from 

 Carham, in Northumberland) to the Sea Coast at Berwick. 

 By N. J. WINCH, Esq. Secretary of the Natural History 

 Society of Newcastle-upon-Tyne. 



[Concluded from p. 19.] 



IN Mr. Smith's present Geological Map of Northumber- 

 land, which differs essentially, in that portion of the north 

 of England, from his large map, the red tint, indicative of the 

 new red sandstone, ceases about three miles from the coast, 

 but it is not possible to trace the slightest distinction between 

 the red rocks at West Ord or Berwick Castle, and those con- 

 nected with the coal and encrinal limestone at Scremerstone*. 

 From the enumeration of the rocks which occur at West 

 Ord, Berwick Castle, the sea-coast, both on the north and 

 south of the harbour, on the hill at Sunnyside, and the shaft 

 of Scremerstone Colliery, there can be no doubt that the 



red 



* To my friend Mr. Fenwick, of Dipton, who has ever kindly furnished 

 me with mining information of a similar description, I am indebted for the 

 section of strata at Scremerstone, and the account of the seams of coal 



worked 



