VI. TERRESTRIAL MAGNETISM. 251 



1201. Edelmann's Declination Magnetometer. 



M. Th. Edelmann, Munich. 



1202. Edelmann's Variation Instrument for Declina- 

 tion. M. Th. Edelmann, Munich. 



1203. Edelmann's Variation Instrument for Horizontal 

 Intensity. M. Th. Edelmann, Munich. 



1204. Edelmann's Variation Instrument for Vertical 

 Intensity. M. Th. Edelmann, Munich. 



1205. Edelmann's Magnetometer for declination, vertical 

 and horizontal intensity. M. Th. Edelmann, Munich. 



1206. Portable Magnet Theodolite. 



M. Th. Edelmann, Munich. 



1207. Weber's Earth Inductor, new construction. 



M. Th. Edelmann, Munich. 



12O7a. Book, containing special treatises on some of the 

 above instruments. M. Th. Edelmann. 



1207b. Book, containing the description of the above-named 

 apparatus. M. Th. Edelmann. 



1209. Photograph of Gauss's Bifilar Magnetometer. 



Magnetic Department of the Observatory in Gottingen, 

 Prof. Dr. Schering. 



1210. Photograph of the observing Telescope, belonging 

 to the above. 



Magnetic Department of the Observatory in Gottingen, 

 Prof. Dr. Schering. 



1211. Photograph of Gauss's Earth Inductor. 



Magnetic Department of the Observatory in Gottingen, 

 Prof. Dr. Schering. 



1212. Photograph of the Needle and Multiplier. (Uni- 

 filar Magnetometer belonging to the above.) 



Magnetic Department of the Observatory in Gottingen, 

 Prof. Dr. Schering. 



1213. Photograph of the Torsion Needle with stop. 

 Magnetic Department of the Observatory in Gottingen t 



Prof. Dr. Schering. 



1214. Photograph of the Theodolite for the determination 

 of the absolute Declination. 



Magnetic Department of the Observatory in Gottingen, 

 Prof. Dr. Schering. 



