366 Eevieics — The National Geological Surveys. 



The work is now done on the scale of 1 : 100,000 ; with 

 occasional enlargements to double this scale. There are contours 

 at intervals of 25 metres. The map will be in 37 sheets, longitude 

 reckoned from Lisbon, 9° 9' W. of Greenwich. The topographical 

 map is not yet complete, and none of the sheets are published with 

 the geology. 



Several memoirs have been published, dating from 1865 ; and also 

 a general map — " Carta Geologica de Portugal," by C. Eibeiro and 

 J. F. N. Delgado, scale 1 : 500,000; 1876 (now out of print). 



Prussia. — Geological surveys of some German States have been 

 made on the scale of 1 : 50,000, not all directly by the Government ; 

 but the great survey previously described will probably absorb these, 

 and will re-map the districts on the larger scale. 



Amongst these local surveys are the following : — • 



Baden, made by Zittel and Sandberger. 



Hesse. — "Geologische Specialkarte des Grossherzogthums Hessen 

 und der angrenzenden Landesgebiete." This survey, under the 

 direction of E. Ludwig, is in eighteen sheets, with text. It was 

 made by the " Mittelrheinischer Geologischer Verein " (Darmstadt), 

 and was published from 1856 to 1872. 



Upper Silesia. — A "Specialkarte der Oberschlesischen Berg- 

 revier," scale 1 : 10,000, is published by the " k. Obei'bergamt in 

 Breslau," in " Lieferungen," of ten or more sheets. The price of 

 each sheet is 1| mark. 



Eoumania. — (Biuroulut Geologieu Romdnu, Buchurest). Estab- 

 lished in 1882, under the direction of Gregoriu Stefanescu, for the 

 purpose of providing materials for the International Geological Map 

 of Europe. One Report has been published (" Anuarulu Biuroului 

 Geologieu," anulu 1882-1883, No. 1, pp. 114, 1884). The rocks 

 contained within the kingdom, which are briefly described in this 

 Eeport, are : — Crystalline Schists (Archaian), Jurassic, Eocene, 

 Miocene, Pliocene and Quaternary. This Eeport contains descrip- 

 tions, with analyses, of mineral springs. 



EussiA. — This survey* was commenced in 1882; the director is 

 B. Cheresheff. 



The publications comprise Eeports in 8vo., and Memoirs in 4to. ; 

 the latter are illustrated by maps and plates ; some of the Memoirs 

 are descriptive of sheets of the maps, others of certain formations in 

 various districts. 



The Eeports are in Russian only ; the Memoirs have title in 

 French (" Memoires du Comite geologique "), and a translation or 

 precis in German. 



The map is on the scale of 1 : 420,000 ; to be completed in 154 

 sheets ; 3 sheets are published. The meridian is Pulkowa, 30° 19' 

 E. of Greenwich. 



The map has explanations and title in French: — "Carte Geo- 

 logique generale de la Eussie d'Europe." 



1 For descriptions of this Survey, and of its piiblications, see Nature, vol. xxix. p. 

 93 ; xxx.p. 608 ; Geol. Mag. Dec. III. Vol. I. p. 84, 1884. 



