FOREIGN CORRESPONDENCE. 



393 



Ko. 



77 K. Chlorite and Mica late. Sand- 



stone. Quartz Eock. Greenstone. 

 Is. 



78 K.W. Granite. Chlorite, and Mica 



Schist. Gneiss. LiTnestone. Sand- 

 stone. Lower Silm-ian Shales. 

 Sandstones. Conglomerates. Green- 

 stone. Serpentine. Old Red 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. Igneoiis 

 Eocks. Caradoc Sandstone. Wen- 

 lock Shale. Mineral lodes. 2s. 6d. 



78 S.W. Granite. Greenstone. Intru- 

 sive Felspathic Traps. Chlorite 

 and Mica Schist. Cambrian Rocks. 

 Lower Silm-ian Shales. Carboni- 

 ferous Limestone. Coal Measiu-es. 

 2s. 6d. 



Hor. Sect., sheet 28. 



78 S.E. Chlorite and Mica Schist. 



Cambrian Slates, &c. of Llanberis 

 and Penrhyn. Lower Silurian 

 Shales and Slates, with Intrusive 

 and Contemporaneous Igneous 

 Eocks. Caradoc Sandstone. Wen- 

 lock Shale. Mineral lodes. 2s. 6d. 

 Hor. Sect., sheets 28, 31, 40. 



79 N.W, Upper Silurian. Old Red 



Sandstone. Carl^oniferous Lime- 

 stone. Lead, &c., lodes. Millstone 

 Grit. New Eed Sandstone. 2s. 6d. 

 79 N.E. Carboniferous Limestone. Mill- 

 stone Grit. Lead, &c., lodes. Coal 



Index to the Coloues and Signs of the 



No. 



Measures. New Red Sandstone. 

 Marl. 2s. 6d. 

 79 S.W. Silurian Sandstones. Shales. 

 Flags. Old Red Sandstone. Car- 

 boniferous Limestone. New Red 

 Sandstone. Lead and Copper lodes. 

 23. 6d. 



79 SrE. Silm'ian. Carboniferous Lime- 



stone. Millstone Grit. Lead, &c., 

 lodes. Coal Measures of Flint, 

 Mold, &c. New Eed Sandstone. 

 2s. 6d. 



80 S.W. New Eed 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 Limestone. Toad- 

 stone. Limestone Shales. Millstone 

 Grit. Lead, &c., lodes. 2s. 6d. 



Hor. Sect., sheet 18. 



81 S.E. Carboniferous Limestone. Toad- 



stone. Limestone Shales. Millstone 

 Grit. Lead, &c., lodes. 2s. 6d. 

 Hor. Sect., sheet 18. 



82 N.W; Coal Measures 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. 6d. 



Hor. Sect., sheet 18. 



Geological Maps. On one sheet, price 5s • 



EOREIGN COEEESPOE'DEIs^OE. 

 By De. T. L. Phipson, oe Paeis. 

 Sletch of the Geologij of tlie Coast of Flanders-— Discovery of a recently- 

 formed Roch near this Coast — Fresh-water Limedone and Marine Tufa 

 —New olservations on the Met amor phism of Sedimentary Strata- 

 Curious ex^eriraents ly M. Ch. Beville — Artificial transformation of 

 Chalk into Dolomite — Signification of the presence of Sulphates in 

 Dolomites — Discovery of soluUe Chlorides in these rochs-— Experiments on 

 Clays and Sandstone — Sydrophane : its artificial production and 

 analysis hy M. Langlois. 



Mai«y curious facts render the coast of Flanders very interesting in a 



2 G 



