I. GEOLOGY. 829 



3256. London and its Environs Topographical and Geo- 

 logical. 



131 square miles, scale yyig-^-, English and French geological 

 references, 1855. R. W. Mylne, F.R.S. 



3255. Contours of London and its Environs. Plain and 

 coloured geologically. 



176 square miles, scale yyj^, 1856. R. W. Mylne,- F.R.S. 



3261. Geological Map of the London and Paris Basins. 



The tertiary and cretaceous districts of England and the north of 

 France, Belgium, Holland, and Denmark. 



The coalfield areas and contoured depths of the adjacent seas, 

 1862. R. W. Mylne, F.R.S. 



3260. Geological Map of London and its Environs. 



159 square miles, scale 1*43 inch to a mile, with a longitudinal 

 section of 18J miles, 1871. R. W. Mylne, F.R.S. 



3253b. Table of Sedimentary Rocks, with a pamphlet. 

 Prof. E. Renevier, Lausanne, Switzerland. 



3253c. Set of 12 Sopwith's Geological Models, with 

 letter-press description. Prof- Tennant. 



3253d. Ten Sheets of Geological Maps and Diagrams 

 of Switzerland. 



Prof. B. Studer, Geological Survey Commission of Swit- 

 zerland, Berne. 

 3253e. Geological Map of the British Isles. 



Society for Promoting Christian Knowledge. 



3262. Map of the Bristol Coalfields and country adjacent, 

 geologically surveyed by William Sanders, F.R.S. 



Bristol Museum and Library. 



The area of the map is 720 square miles. The topographical basis consists 

 of a reduction to the scale of 4 inches to the mile of 218 parish maps. The 

 geological lines are entirely the result of the author's personal surveys ; about 

 20 years were devoted to the work. The map was published, in 1864, at the 

 author's cost. In nineteen sheets. Folio. J. Lavars, Bristol. 



A reduced copy, on the scale of one inch to the mile, in one sheet, was 

 published in 1873. 



3264. Geological Map of the British Isles, by Professor 

 John Phillips, F.R.S. 



Society for promoting Christian Knowledge. 



3265. Geological Map of the Arctic Regions. 



C. E. De Ranee. 



The topography is taken from the Chart accompanying the Admiralty corre- 

 spondence connected with the British Arctic Expedition of 1875. The 

 geological boundaries of Parry Islands, and the north coast of America, from 

 the determination by Conybeare, Murchison, Salter, and Dr. Haughton of 

 t he specimens brought back by the expeditions of Franklin, Parry, Back, 



