366 A. VaugJian Jennings — Geology of Bad Nauheim.- 



those of the Vogelsgebirge. One can only conclude that the patches 

 in the immediate neighbourhood of Bad Nauheim represent lava- 

 flows at a considerable distance from the active centres, and that 

 they forced their way through the sedimentary rock, with com- 

 paratively little disturbance or metamorphism. 

 ; The fact that there are reappearances of basalt between Homburg 

 and Ober Erlenburg and on towards Wiesbaden, suggests the 

 existence of a very wide zone which may have a far greater 

 subterranean extent than the minor surface exposures lead one 

 to expect. 



In conclusion, I have to express my thanks for assistance to 

 Professor Kinkelin, of Frankfurt ; Professor Brauns, of Giessen ; 

 Professor Wittich, of Darmstadt ; and Professor Denckraann, of 

 Berlin ; to Herr Bergrath Otto Weiss, of Nauheim ; and lastly, 

 and very gratefully, to Herr Sanitatsrath Dr. Ferdinand Credner, 

 who, in the interests of geology, treated with a generous leniency 

 a somewhat disobedient patient. 



The works mentioned below cannot, of course, be regai'ded as 

 a complete bibliography. I have only recorded such as wei'S 

 brought to my notice during a brief visit as a starting-point for 

 the next student who has the good or bad luck to find himself at 

 Kanheim. 



"Geologische Specialkarte des Grossherzogthume Hessen." Descrip- 

 tions of (a) Giessen section by Dieffenbach, 1856 ; (b) Friedberg 

 (including Nauheim) section by Ztidivig, 1855. 



Bad Nauheim : Guide by Serr Bergrath Otto Weiss & Dr. Groedel, 

 1888. (This edition is mentioned here as it contains 

 a chapter on the geology of the district more complete than 

 that of the ordinary guides.) 



Kinkelin. — (a) " Erlaiiterungen zu den geologischen tJbersichtskarten 

 der Gegend zwischen Taunus und Spessart " : Sencken- 

 bergischer Bericht, Frankfurt, 1889. (b) " Die Tertiar u. 

 Diluvialablag. d. unteren Mainthales " : Abh. z. geol. 

 Specialkarte von Preussen, Bd. ix, Heft 4, 1892. (c) 

 "Geol. Tektonik d. Umgebung v. Frankfurt": Sencken-: 

 bergische Naturforsch. Gesellschaft, 1885. 



WitticJi. — " Bericht liber die geologische Aufnahme der Umgegend 

 von Bad Nauheim " : Vereins fiir Erdkunde nnd der Grossh. 

 geol. Landesanstalt zu Darmstadt, Folge iv, Heft 19, 1898. 



Benckmann. — " Silur und Unterdevon im Kellerwalde " : Jahrb. der 

 konigl. preuss. geol. Landesanstalt, 1896. 



Wagner. — " Chronik von Bad Nauheim," Nauheim, 1897. 



Zepsius. — " Geologic von Deutschland," Bd. i (1892). '■ 



Koch. — Jahrb. Preuss. Geol. Landesanstalt, Bd. i (1881), Taf. vi, 

 Fig. 1. 



Biinsen. — Stud, der Gottingischen Vereins Bergmannischen 

 Freunde, Bd. iv. Heft 3 ("Uber de Nauheimer Thermal- 

 quellen "). 



Bromeis. — Jahresbericht. d. Wetterauischen Gesellschaft f, d. 

 Naturkund. (" Grosse Soolsprudel v. Nauheim "). 



