HISTOUY OF THE SOCIETY. 577 
the Dee, from its sources in Braemar to its mouth at Aber- 
deen, by Mr Macgillivray. 
The Secretary read two communications from Mr Lau- ^^^g. 
rence Edmondston of Unst, in Zetland, in regard to the 
Snowy Owl, and the Icelandic Gull. Professor Jameson 
then read an Essay on the Distribution of Eossil Organic 
Remains, as connected with the Theory of the Earth. 
Mr Greville gave an account of four new species of April 6. 
Peziza found in Scotland, illustrated by drawings. Professor 
Jameson read a notice from Captain Scoresby jun. regard- 
ing recent Experiments made by him on the remarkable 
Effects of Percussion on Steel in producing strong Magnetic 
Powers. The Professor also read an account of Tiede- 
mann's Comparison of the Brain of Man with that of Apes, 
Seals, Whales, Bats, and other Animals of the Class Mam- 
malia. The Secretary then read a notice regarding the 
Northern and Speckled Diver, by Mr L. Edmoadston. 
Professor Jameson read a short account of the Tusk df April 20. 
a Fossil Elephant dug up in Lincolnshire, illustrated by a 
drawing of the Tooth. He then gave an account of the 
various Strata, Beds, and Veins around Lochgilphead, il- 
lustrating his descriptions by sketches. The Professor like- 
wise read extracts of a letter from Dr Oudney, dated Tri- 
poli, 24th January last. The Secretary read a notice of a 
remarkable Hail-Storm in Essex: likewise extracts of a 
letter from Mr Strang of Lopness, in Orkney, describing 
some singular Effects of the violent Gales in that quarter. 
He also laid before the Society a Thermometrical Register 
taken every hour of the day and night, between 6 a. m. of 
1st April and 6 p. m. of 6th April : the general results 
were, that generally the minimum was at 6 a. m., and the 
