LIST OP CONTRIBUTORS. 



GUMBEL, DR. (Geoguostic Survey of 



Bavaria), 16. 

 HAAK, W., Neuhaus, Thiiringen, 8, 



14, 15. 



HAEDICKE, G., Demmin, 3, 4, 5, 15. 

 HAHN, A. & E., Cassel, 3, 15, 16. 

 HALLE, INDUSTRIAL SCHOOL (Dr. 



Kohlmann), 3, 4, 12. 

 HALLE, TOWN SCHOOL (Meyer), 3. 

 HALLE, UNIVERSITY OF, 3, 4. 

 HAARMANN, DR. W., Holminden, 13. 

 HARTNACK, DR. E., Potsdam, 18. 

 HAUCHECORNE, PROF. (Director, 



Eoyal Geological Institute and 



Mining Academy), Berlin, 12, 16. 

 HEINTZ, PROF. DR., Halle, 13. 

 HEINZERLING, PROF. DR. (Poly- 

 technic School), Aix-la-Chapelle, 



12. 

 HEIS, PROF. DR. E., Munster, 2, 9, 



11. 



HELLER, F., Nuremberg. 

 HELMERT, PHDF. DR. (Polytechnic 



School), Aix-la-Chapelle, 15. 

 HELMHOLTZ, PROF. DR., Berlin, 9, 



1O. 

 HENNEBERG, PROF. DR., Gottingen, 



18. 



HENSEN, PROF. DR., Kiel, 18. 

 HERBST, A., 26A, Krautstrasse, 



Berlin, 7, 1O, 11, 13. 

 HERMANN, PROF. G. (Polytechnic 



School), Aix-la-Chapelle, 1. 

 HETTSTREU, Kiel, 11. 

 HIMLY, PROF. DR., Kiel, 8. 

 HIRSCHBERG, F., 9, Weidenstrasse, 



Breslau, 6. 

 HITTORF, PROF. DR., Munster, 1O, 



13. 

 HOFMANN, PROF. DR. A. W., 



Berlin, 13, 19. 

 HONIGMANN, M., Aix-la-Chapelle, 



31. 



HORNUNG, F., Langenbeutingen, 11. 

 HiJBNER, PROF. DR., Gottingen, 13. 

 HUGERSHOFF, F., Leipzig, 13, 19. 

 HULWA, PROF. DR., Breslau, 13. 

 HUTSTEIN, J., Breslau, 13. 



INDUSTRY, HIGH SCHOOL OF, 

 Cassel, 2, 3, 9, 15, 16, 17, 18. 



INDUSTRIAL SCHOOL (Dr. Kohlmann, 

 Director), Halle, 3, 4, 12. 



INSTITUTE OF PHYSICS (Prof. Dr. 

 A. Glaus), University of Freiburg, 

 Breisgau, 19. 



INSTITUTE OF PHYSICS (Prof. Kars- 

 ten, Director), University of Kid, 

 3,18. 

 INTZE, PROF. O. (Polytechnic 



School), Aix-la-Chapelle, 3, 4. 

 JACOBSEN, PROF. DR., Rostock, 13. 

 JESSEN, PROF. DR., Eldena, Pome- 



rania, 18. 



JOBST, F., Stuttgart, 13. 

 JOLLY, PROF. DR. von, Munich, 3, 



5, 8, 13. 



JUNG, CH., Giessen. 

 JUNG, E., Heidelberg, 7, 1O, 18. 

 KAHLBAUM, C. A. F., Berlin, 13. 

 KARSTEN, PROF. DR., Kiel, 3, 18. 

 KARSTEN, PROF. DR., Rostock, 7, 15. 

 KAUFMANN, K. J., Konigsberg, 



Prussia, 13. 

 REISER & SCHMIDT, 14, Johannis 



Strasse, Berlin, 7, 1O. 

 KIEL, PHYSICAL INSTITUTE OF THE 



UNIVERSITY OF, 3, 18. 

 KLEEMANN, Halle, 3. 

 KLINKERFUES, PROF. DR., Gottingen, 



3, 14. 



KNOBLAUCH, PROF. DR., Halle, 3, 4. 

 KNOBLICH, T., 24, Amiralitdt Strasse, 



Hamburg, 3. 



KNY, PROF. DR., Berlin, 18. 

 KOBELL, PROF. DR. F. von, 



Munich, 7. 



KOHLMANN, DR., Director, Indus- 

 trial School, Halle, 3, 4, 12. 

 KRAMER, C., Freiburg, Breisgau, 



13. 



KRAUSE, PROF. DR., Gottingen, 18. 

 KREBS, PROF. DR. G., Franhfort-on- 



Maine, 4. 



KRONECKER, PROF. DR., Leipzig, 18. 

 KRUSS, A., Hamburg, 7. 

 KUHNEMANN, DR. G., Dresden, 13. 

 KUHTZ & Co., Brandenburg-on- 



Havel, 18. 

 KUMMER, PROF. DR. E. E., Berlin, 



5. 



KUNDT, PROF. DR., Strasburg, 7, 9. 

 LANDOLT, PROF. DR. (Polytechnic 



School), Aix-la-Chapelle, 13, 19. 

 LANDOIS, PROF. DR., Munster, 18. 

 LANDSBERG & WOLPERS, Hanover, 



1, 3, 10, 19. 



LAQUEUR, PROF., Strasburg, 18. 

 LASAULX, PROF, von, Breslau, 13, 



15, 16. 

 LASPEYRES, PROF. (Polytechnic 



School), Aix-la-Chapelle. 

 LEITZ, E., Wetzlar, 18. 



