558 
APPENDIX. 
1826. Professor Graham, Vice-President, in the chair. — There 
Jan. 28. j-g^j ]y|j, Blackadder's account of Highland Alluvium, 
being the concluding part of his essay on Sand-fields, in 
which he extended his observations to the summits of pri- 
mitive mountains. — Professor Jameson then read a com- 
munication from a foreign correspondent, on the probabi- 
lity that Meteoric Stones are generated in the atmosphere, 
and not derived from the moon, nor from any other extra- 
mundane source. — The President exhibited specimens of 
Beryl, which occur, along with rock-crystal, in drusy cavi- 
ties in the granite of the mountains of Morne in Ireland. 
Feb- 11. David Ritchie, D. D. in the chair. — Prof. Jameson com- 
municated a note of Low Temperatures, observed by Mr 
Grant, at his seat of Rothiemurchus, in the Highlands of 
Scotland, during the late severe frost of January ; the low- 
est being 6 below 0, and this extreme cold having continued 
for several hours. — The Professor also gave an account of 
the occurrence of phosphate of lime, in balls or concretions, 
in the bituminous shale of the coal formation. — Dr R. E. 
Grant then read a paper on the structure and nature o£the 
Spongilla Jriahilis^ and exhibited recent specimens from 
the rocks and stakes on the east side of Lochend, near Edin- 
burgh. — There was exhibited to the meeting a collection 
of magnificent specimens of Doubly Refracting Spar from 
Iceland, the property of Mr Witham, and collected, last 
summer, by Mr Rose and Mr Brown, from a great vein, 
about fourteen feet wide, traversing trap-rock of the nature 
of amygdaloid. 
Feb. 25. Reverend Dr Alexander Brunton, Vice-President, in the 
chair. — The Secretary read Mr William Scott's Observa- 
tions on the Climate of Shetland, &c. and laid before the 
meeting a Meteorological Journal, kept at Unst, by Mr 
4 
