Reports and Proceedings. 279 
No. 1. Limestone from Fintry. 
No, 2. Theoretical composition of dolomite, according to Rammelsberg. 
The white layers that are often seen filling up cracks and fissures 
in coal are generally considered to be carbonate of lime, but consider- 
able quantities of carbonate of iron and carbonate of magnesia are 
likewise present. ‘The following is the composition of a speci- 
men :— 
Carbonate of Iron . : : j 5 ; 5 19-72 
i of Lime . : é : Be : 6 53°00 
e of Magnesia . s oi Bre: j : 18-04 
Carbonaceous matter and insoluble . : 3 5 9-24 
100:00 
Remarks on the theories respecting the dolomitization of lime- 
stones, and on rocks and minerals containing silicate of magnesia, 
concluded this interesting paper. 
Il. April 10th (see Grotocicat MaAcazine for May, p. 219), Mr. 
G. SomeRvILLe read a paper On the Geological Features of the 
Country around Jerusalem, remarking that a high central tract of 
limestone runs north and south near the centre of Palestine, forming 
the water-shed of the country about two miles westward of Jerusa- 
lem. According to Lyuch, it is 2,700 feet above the Mediterranean 
on the west; and on the east it rises 4,000 feet above the Jordan 
Valley and Dead Sea. The hills of Jerusalem, about 600 feet high, 
consist of Lower Cretaceous limestone, white, flat-bedded, in layers 
of various thicknesses, containing flint-nodules, and excavated for 
tombs, and subterranean quarries and water-tanks. These hills and 
their intervening valleys have evidently been shaped out of the old 
limestone table-land by the denuding power of water, acting during 
long periods, and long before the times of history or tradition. 
III. The last Monthly Meeting of this Society’s Winter-session 
was held in their Hall, Andersonian University, April 13th; Rev. H. 
W. Crosskey in the chair.—Mr. James TuHomson exhibited and de- 
scribed a fine collection of Corals from the Lower Carboniferous strata 
of Linlithgowshire, Lanarkshire, and Ayrshire. Mr. Thomson stated 
that there were upwards of forty species, chiefly of the genera 
Lithodendron, Lithostrotion, Cyathophyllum, Cyathopsis, and Clisio- 
phyllum, their structure being shown by numerous polished lon- 
gitudinal, diagonal, and cross sections.— Mr. ANDREW ARMOUR 
exhibited a collection of Fish-remains from the Carboniferous strata 
of the West of Scotland, including fine remains of Megalichthys 
Hibberti, and an undescribed species of the same genus; of Rhizodus 
sauroides, and of Cochliodus, Petalodus, and Ctenodus, all of which 
were briefly described.—The Secretary exhibited a specimen of Pel- 
tocaris aptychoides (Salter), a small Phyllopod Crustacean, from the 
Graptolite-shale of Moffat—A section of the Carboniferous beds 
overlying the Old Red Sandstone at Carluke was exhibited by Mr. 
Hunter, Braidwood.—Dr. BrycrE read a paper entitled Motes on 
the Earthquake-District of the County of Perth.—The CuHairman, 
