MAPS AND SECTIONS. 349 



Sweden. Geologiska undersiikning. [Geological Survey.] 4 sheets. 

 Scale 1^: 50,000. Stockholm [printed 1873, but issued 1874]. 



No. 50. Arsta. By L. Palmgren, A. Pettersson, G. Gellerstedt, 

 C. Ltjlin, and K. Fredholm. The formations are : — Postglacial, in 7 

 divisions ; Glacial, in 3 divisions. Limestone, Grey and red gneisses. 

 Garnet- and graphite-gneiss ; Diorite ; Stockholm granite ; Pegmatite. 



No. 51. Nyniis. By L. Palmgren. The formations are : — Post- 

 glacial, in 6 divisions ; Glacial, in 3 divisions. Limestone, Eurite and 

 mica-schist, Grey and red gneisses. Garnet- and graphite-gneiss. Peg- 

 matite. 



No. 52. Trosa. By D. Hummel and L. Palmgren. The formations 

 are : — Postglacial, in 7 divisions ; Glacial, in 2 divisions. Limestone, 

 Eurite and eurite-quartzite. Garnet-gneiss, Hornblende-gneiss, Grey 

 and red gneisses. Diabase and hyperite, Stockholm granite. Pegmatite, 

 Quartz, Diorite. 



No. 53. Bjorksund. By M. Stolpe. The formations are: — Post- 

 glacial, in 5 divisions ; Glacial, in 2 divisions. Eurite, Limestone, Diabase, 

 Garnet-gneiss, Red and grey gneisses, Pegmatite, Granite. W. W. 



Switzerland. Beitrage zur geologische Karte der Schweiz, 13° Lief, 

 die Sentis-Gruppe. (2 geol. maps and 2 sheets of sections.) By 

 Arnold Escher von der Linth. Commission geologique Suisse. 

 Berne. 



Texas, Latest Map of the State of. By Dr. A. R. Roessler. Scale 

 20 miles to an inch. With small map (70 miles to an inch) 

 " showing agricultural districts and varieties of soils." There is 

 also a Table of " principal minerals, rocks," &c. New York. 



Tyrone. 3 Sheets of the Geological- Survey Map (Ireland). Scale 

 6 inches to a mile. By Edward T. Hardman. 



These sheets represent the greater part of the Dungannon Coal Field, 

 with some of the surrounding country. 



Sheet 47 shows the country around Coalisland, and takes in a part of 

 the W. shore of Lough Neagh. There are 9 formations : — Aqueous^ ^'c. 

 Freshwater Shingle, Recent Deposits, Drift (U. and L. Boulder Clay, 

 and Middle Sands, &c.). Pliocene Clays with lignite, &c., Chalk, U. 

 Bunter Sandstone, Coal Measures, Carboniferous Limestone. Vol- 

 canic. Miocene Basalt. A portion of the basaltic sheet comes into 

 the northern part of the map, with a small patch on the borders of the 

 coal-field. Two basaltic dykes are marked. 



Sheet 54. This extends to the west of Sheet 55, and includes tho 

 country around tho town of Dungannon. The formations shown are : — 

 Aqueous, 6fc. Recent Deposits, Drift, U. Bunter Sandstone, L. Coal 

 Measures, Millstone Grit, Yoredale Beds, Carboniferous Limestone with 

 interbedded sandstones. Volcanic. Two small basaltic dykes. Tho 

 Coal Measures form tho southern boundary of tho coal-field, and con- 

 tain two coal-seams — the " Main Coal " (4 to G feet thick), and tho 

 ** Lower Coal " (1 to 2 feet). They extend to the eastward bcHcath tho 



I 



