FOREIGN CORRESPONDENCE. 
393 
No. 
77 N. Chlorite and Mica late. S-.md- 
stone. Quartz Rock. Greenstone. 
Is. 
78 N.W. Granite. Chlorite, and Mica 
Schist. Gneiss. Limestone. Sand- 
stone. Lower Silurian Shales. 
Sandstones. Conp;lonieratos. fJreon- 
stone. Serpentine. Old Eed Sand- 
stone. Carboniferous Limestone. 
Mineral lodes. 2s. 6d. 
Hor. Sect., sheet 40. 
78 N.E. Chlorite and Mica Schist. 
Lower Silurian Shales. Carboni- 
ferous Limestone. Millstone Grit. 
Calcareous Sandstone. Igneous 
Rocks. Caradoo Sandstone. Wen- 
lock Shale. Mineral lodes. 2s. Cd. 
78 S.W. Granite. Greenstone. Intru- 
sive Felspathic Traps. Chlorite 
and Mica Schist. Cambrian Rocks. 
Lower Silurian Shales. Carboni- 
ferous Limestone. Coal Measures. 
2s. 6d. 
Hor. Sect., sheet 28. 
78 S.E. Chlorite and Mica Schist. 
Cambrian Slates, &c. of Llauberis 
and Penrhvn. Lower Silurian 
Sliales and Slates, with Intrusive 
and Contemporaneous Igneous 
Rocks. Caradoc Sandstone. Wen- 
lock Shale. Mineral lodes. 2s. 6d. 
Hor. Sect., sheets 28, 31, 40. 
79 N.W. Upper Silurian. Old Red 
Sandstone. Carboniferous Lime- 
stone. Lead, &c., lodes. Millstone 
Grit. New Red Sandstone. 2s. 6d. 
79 N.E. Carboniferous Limestone. Mill- 
stone Grit. Lead, &c., lodes. Coal 
Index to the Coloitbs and Signs of the 
No. 
Measures. New Red Sandstone. 
Marl. 2s. fid. 
79 S.W. Silurian Sandstones. Shales. 
Flarrs. Old Rod S.aniLstone: Car- 
h(miferous Limestone. New Red 
•iSandstone. Lead and Copper lodes. 
2s. 6d. 
79 S.E. Silurian. Carboniferous Lime- 
stone. Millstone Grit. Lead, &c., 
loiles. Coal Measures of Flint, 
Mold, &c. New Red Sandstone. 
2s. 6d. 
80 S.W. New Red Sandstone. Marl. 
2s. 6d. 
81 N.E. Carboniferous Limestone. Toad- 
stone. Limestone Shale. Millstone 
Grit. Coal Measures. Lead, &c., 
lodes. 2s. 6d. 
Hor. Sect., sheet 18. 
81 S.E. Carboniferous Ijiniestone. Toad- 
stone. Limestone Shales. Millstoaie 
Grit. Lead, &c., lodes. 2s. 6d. 
Hor. Sect., sheet 18. 
81 S.E. Carboniferous Limestone. Toad- 
stone. Limestone Shales. Millstone 
Grit. Lead, lic, lodes. 2s. 6d. 
Hor. Se^-t., sheet 18. 
82 N.W. Coal .Measiires with Coal Crops. 
Millstone Grit. Lower New Red 
Sandstone. Magnesian Limestone. 
2s. 6d. 
Hor. Sect., sheet 18. 
82 S.W. Mountain Limestone. Mill- 
stone Grit. Coal Measures with 
Crops of Coal, and Faults. Lower 
New Red Sandstone. Magnesian 
Limestone. 2s. Gd. 
Hor. Sect., sheet 18. 
Geological Maps. On one sheet, price 5s- 
FOREIGN COKEE SPO^fDEXCE. 
By Db. T. L. Pbipson, of Pakis. 
Sketch of tJie Geology of the Coast of Flanders — Discovery of a recently- 
formed Eocli near this Coast — Fresh- irater Limedcnfi and Marine Tufa 
— New observations on the Metfimorjjh'sm of Sedimentary Strata — 
Curious experiments by M. Ch. Deville — Artificial transformation of 
Chalk into Dolomite — Signification of the presence of Sulphates in 
Dolomites — Discovery of soluble Chlorides in these rocks — Fxperiments on 
Clays and Sandstone — Sydrophane : its artificial production and 
analysis by M. Langlois. 
Manx curious facts render the coast of Flanders very iuteresting in a 
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