LIST OF CONTRIBUTORS. 



xliii 



VIRCIIOW, PROF. DR. (Pathological 

 Institute), Berlin, 18. 



VOSEL, DR. H. C. (Astronomer of 

 the Royal Astro -Physical Observa- 

 tory), Potsdam, 11. 



VOGEL, PROF. DR. H. W., Berlin, 

 11. 



VOIGT, G. (Voigt & Hochgesang), 

 Gottingen, 3, 16, 18. 



VOIGTLANDER AND SON (Chevalier 

 von Voigtlander), Brunswick, 7. 



VORSTER AND GRCJNEBERG, Kdlk, 



Cologne, 13. 

 Voss, R., Berlin, 9, 1O. 

 WAIBLER, L., Darmstadt, 1O. 

 WALDENBURG. PROF. DR., Berlin, 



5, 18. 

 WANNSCHAFF, J., 63, Grossbeeren 



Strasse, Berlin, 15. 

 WARMBRCNN, QUILITZ, & Co., 40, 



Rosenthaler Strasse, Berlin, 5, 7, 



8, 9, 10, 13, 14, 18, 19. 

 WASSERLEIN, R., 34, Bernburger 



Strasse, Berlin) 18. 

 WEBER, DR. A., Darmstadt, 18. 

 WEBER, PROF. DR. H. (Collegium 



Carolinum), Brunswick, 5. 

 WEBER, PROF. R. (Academy of 



Forestry), Aschaffenburg, 1. 

 WEBER, A., Wilrzburg, 5, 18. 



WEBER, CH., Eisenach, 16. 

 WEINHOLD, PROF., Chemnitz, 7. 

 WEINZIERL, J., Glogau, Silesia, 13. 

 WESSELHOFT, Halle, 8. 

 WBSTPIIAL, G., Cells, Hanover, 3. 

 WICHELHAUS, PROF., Berlin, 13. 

 WICHMANN, A., l7,Johannis Strasse, 



Hamburg, 18. 

 WIECKE, DR., Cassel, 2. 

 WIENER, PROF. DR., Carlsruhe, 2. 

 WINKEL, R., Gottingen, 18. 

 WINKLER, PROF., Freiberg, 13. 

 WINNECKE, PROF. DR., Strasburg, 



11. 

 WINTER, E., Eimsbuttel, Hamburg, 



9. 



WOHLER, PROF. DR., Gottingen, 13. 

 WOHLERS (Successor to Campbell), 



Hamburg, 18. 



WOLCKER, PROF. DR., Halle, 18. 

 WOLFF & SONS, Heilbronn and 



Vienna, 13, 19. 

 WULLNER, PROF. DR. (Polytechnic 



School), Aix-la-Chapelle, 1O, 12. 

 ZEISS, C., Jena, 7, 18. 

 ZIEGLER, DR. A., Freiburg, Breisgau, 



17, 18. 

 ZIMMER BROTHERS, Stuttgart, 3, 



15. 

 ZORN, W., Berlin, 5. 



HOLLAND. 



ASSEN SECONDARY GOVERNMENT 

 SCHOOL, 3, 8. 



BAKHUYZEN, H. G. VAN DE SANDE, 

 Director, Observatory, Ley den, 

 11. 



BECKERS SONS, West Zeedyk, Rot- 

 terdam, 3. 



BLEEKRODE, DR. L., The Hague, 1O, 

 19. 



BOOGAARD, PROF.DR. J. A., Director 

 of the Museum of Anatomy, Aca- 

 demy of Ley den, 18. 



BOSSCHA, PROF. J., Royal Polytech- 

 nic School, Delft, 1O, 13, 17> 

 18. 



BRONDGEEST, DR., Physiological La- 

 boratory and Ophthalmological 

 School, Utrecht, 18. 



BUYS-BALLOT, PROF., Utrecht, 3, 6, 

 8,11, 14, 15, 18. 



DELFT ROYAL POLYTECHNIC SCHOOL, 

 10, 13, 17, 18. 



DE Loos, DR. D., Director of the 

 Secondary Town School, Leyden, 

 8,13. 



DIRECTOR, The, of the Physical 

 Laboratory, University of Gro- 

 ningen, 5, 6, 10, 12. 



DOKDERS, PROF., Physiological La- 

 boratory and Ophthalmological 

 School, Utrecht, 6, 7, 1O, 18. 



ENGELMANN, PROF., Physiological 

 Laboratory and Ophthalmological 

 School, Utrecht, 5, 1O, 18. 



FERHAAR, A. T., Utrecht, 18. 



GRONEMAN, DR. F. G., Director of 

 the Secondary Government School, 

 Groningen, 4. 



GUNNING, DR. J. W., Professor of 

 Chemistry, " Athenaeum Illustre" 

 Amsterdam, and Scientific Adviser 

 to the Treasury Department, Hol- 

 land, Amsterdam, 5, 8. 



HARTING, PROF. DR. P., University 

 of Utrecht, 18. 



