159 



2. Geological Notices. By Dr Fleming. 



(1.) Additional example of Diluvial Scratches on the Rocks 

 in the neighbourhood of Edinburgh. 



The author stated that, recently, an opportunity had presented 

 itself of observing, at a newly-opened sandstone quarry, dressed and 

 scratched surfaces, at an elevation above the level of the sea greater 

 than any examples of the same kind of diluvial action as yet re- 

 corded, as occurring in the neighbourhood. The locality is east- 

 ward of the east Cairn Hill, in the Pentland Kills, at a place termed 

 " Thomson's Walls," and its elevation, according to Knox's map of 

 Mid-Lothian, is 1400 feet. 



Dr Fleming then stated, that, last autumn, in addition to the ex- 

 ample of a dressed and scratched surface 130 yards westward of 

 Granton Pier, on a level with the beach, he had observed a similar 

 occurrence at the east side of the harbour of North Berwick, near 

 the " Auld Kirk," on the surface of a rock of amygdaloid; and added, 

 that he had found similar scratches, at the sea-level, on the south side 

 of Montrose Basin. 



The author next adverted to an example of dressed vei'tical 

 surfaces, with horizontal scratches, on the northern base of North 

 Berwick-Law. He likewise referred to the hprizontal scratches on 

 a vertical face of rock recently exposed at the Hadderwick Lime 

 Quarries, north from Montrose. 



Dr Fleming next called the attention of the Society to the Black- 

 ford Hill example of a dressed and scratched surface, and intimated 

 that the scratches had a dip to the eastward, reaching, in some cases, 

 to 50". He stated it as probable, that the phenomena, instead of 

 having resulted from diluvial action, had been produced by the 

 abrading operations of the Braid Burn. 



Verbal Notice. 

 (2.) On the Fluor-Spar of Aden. 



Dr Fleming exhibited to the Society several beautiful examples 

 of quartz and calcedony, in the form of cakes or circumscribed 

 stalagmites, from the fort of Aden in the Red Sea, which had been 



