298 Proceedings of Societies. 
‘¢ Researches on the Manufacture of Prussiate of Potash by the late 
John Lee and T. Richardson.” By Dr Ricuarpson. 
‘‘On the Constant Increase of Organic Matter in Cultivated Soils.’’ 
By Dr F. L. Purrson. 
Section C.—GEOLOGY. 
President—Professor Warrineton W. Smyru. 
** On Coal, Coke, and Coal Mining in Northumberland and Durham.’ 
By Messrs N. Woop, J. Tayxor, J. Maruey, and J. W. Pease. 
«< On the Fossil Teeth of a Horse found in the Red Clay at Stockton.” 
By J. Hoae, M.A. 
‘‘On the Coal Measures of Sydney, Cape Breton.” By Mr J. P. 
LESLEY. 
*¢ On the Magnesian Limestone of the County of Durham.”’ By Messrs 
G. B. Forster and J. Daauisn. 
“On the Skiddaw Slate Fossils.” By Professor Harkness. 
‘‘ On the Hornblendic Greenstones and their relations to the Meta- 
morphic and Silurian Rocks of the County of Tyrone.” By Professor 
HARKNESS. 
“On Two New Coal-Plants from Nova Scotia.’’ By Dr Dawson.—One 
of the plants, Z. Acadianus, belonged to the genus Lepidophloios of 
Sternberg ; the other was a1 example of a type of Lepidodendron, very 
characteristic in Nova Scotia of the lower coal measures associated with 
the lower carboniferous limestone. The author concluded that the original 
species of Sternberg, L. cartcinum, was founded on the fragment of the 
bark of an old trunk, having the leaf bases flattened, and hence described 
as scales. It was evidently, in short, closely allied to the specimen de- 
scribed. The genus Ulodendron was, he thought, identical with Lepi- 
dophloios, but apparently founded on specimens having the leaf bases 
preserved, with the cone scars, but wanting vascular scars; but he was in 
doubt as to the claims of the name Ulodendron on the ground of priority. 
It appeared to him that the generic names Ulodendron, Lomatophloios, 
Leptoxylum, Pachyphloeus, and Bothrodendron should be abolished 
in favour of Lepidophloios, unless indeed it should appear that any of these 
names had priority indate. The second plant described was the Lepido- 
dendron corrugatum, which was one of the most abundant in the lower 
coal measures of Nova Scotia and New Brunswick. The species was 
remarkable for its variability, and also for the dissimilar appearances of 
old stems and branches occasioned by the separation of the areoles in the 
growth of the bark, instead of the areoles themselves increasing in size, 
as in some other Lepidodendra. : 
“On Models illustrating the Contortions in Mica Schist and Slate.’’ 
By Mr H. C. Sosy. 
“On a Deposit of Sulphur in Corfu.” By Professor Ansrep. 
‘¢ On the Metamorphic Origin of the Porphyritic Rocks of Charnwood 
Forest.”’ By Professor Anstep.—The part of England referred to is a 
small district in the county of Leicester, east of the various other develop- 
ments of igneous rock in England. ‘The object of this paper was to show 
that the rocks, consisting of syenites, granites, and others of the ap- 
pearance and character generally regarded as igneous, were really of the 
same date as the slates with which they seem to alternate. 
