Scientific Intelligence. — Geology. 197 



ready, and will immediately be given to the public. This map 

 is partly compiled from various geognostical maps already exist- 

 ing of some of the districts of Germany, and partly founded on 

 original information communicated by some of the most distin- 

 guished geologists of the day. The names of the contributors are 

 not given in the title, but we understand that the materials have 

 been chiefly furnished by Von Buch, Alex, von Humboldt, Fre- 

 derick Hoffmann, Von Dechen, and Von Oeynhausen. Besides 

 the various scattered observations on the geognosy of Germany 

 which have been made known since the publication of the last 

 edition, the maps communicated to the great Vienna meeting of 

 naturalists will also be made use of, and especially those of 

 Partch and Rosthorn. The observations of Zobel and Carnall 

 in Silesia, of Klipstein in the Vogelsgebirge, of Stift in the 

 Westerwald and Lahn, and of Merian on the Black Forest, have 

 caused material alterations in the dehneation of those districts. 

 The progress lately made in the knowledge of the geognostical 

 structure and relations of Germany, has simplified considerably 

 the series of colours employed to indicate the formations ; for, 

 in some cases, by the comparisons instituted, deposits beheved 

 to be distinct have been identified and united. Thus, while the 

 table of colours employed in the former editions amounted to 

 forty-eight shades, forty-one have been, in the present instance, 

 found sufficient. The publishers of the above mentioned map 

 have also the intention to prepare, immediately, a small general 

 geognostical map of Middle Europe, which will be about 2 feet 

 long, by 2 feet 8 inches broad, and include England, France, 

 Germany, Prussia, Austria, Poland, Switzerland, and Upper 

 Italy. The same materials will be employed for this map as for 

 the other ; and for those districts to which the latter does not ex- 

 tend, the best sources of infonnation will be had recourse to. 

 This map, which is intended for general circulation, and will 

 appear about the end of the present year^ will be very moderate 

 in price, not more than three or four dollars. The well known 

 spirit and liberality of Messrs Schropp & Co. ensure the good 

 execution of the interesting undertaking we have announced. 



13. Flan in Relic/ of Wurtemberg. — M. Bath, conservator 

 of the Museum of Natural History at Tubingen, has for some 

 time been occupied with the preparation of a plan in relief of 



