xxxvm 



LIST OF CONTRIBUTORS. 



THIEL, Paris, 7. 

 TONDOLA & Co., Paris,, 3. 

 TRAMONT, 9, Rue de I'Ecole de Mede- 



cine, Paris, 18. 

 TRESCA, H. E., Membre de I'Aca- 



fUmie des Sciences, Sous-Directeur 



duConservatoire des Arts et Metiers, 



Paris. 

 TROUVE, G., 6, Eue Therese, Paris, 



10, 18. 



VIDAL, L., 13, Quai Voltaire, Paris, 



7. 



VILLARCEAU, I., Membre de V In- 

 stitut, 18, Avenue de VObserva- 

 toire, Paris, 3. 



WENTZEL, MADAME, 6, Rue Breton- 



viller, Paris, 2. 

 WERLEIN, Paris, 2, 17, 18. 

 WIESNEGG, 64, Rue Gay Lussac, 



Paris, 13. 

 WINNEREL, 35, Galerie Montpensier 



( Gabriel), Paris, 3. 



GERMANY. 



ACADEMY OF MINES, KOYAL (Prof. 

 Hauchecorne, Director), Berlin, 

 12, 16. 



ACADEMY or MINES, KOYAL (Prof. 

 Richter, Director), Freiberg, 

 Saxony, 1O, 12, 13, 16, 17. 



ADMIRALTY, IMPERIAL, HYDRO- 

 GRAPHIC DEPARTMENT AND NAU- 

 TICAL OBSERVATORY, Berlin and 

 Hamburg, 8, 9, 14, 15. 



ALBERT, J. W., 34, Neue Mainzer- 

 strasse, Frankfort-on-Maine, 6, 7. 



ALBRECHT, Tubingen, 6, 17. 



ALTHAUS, E., Superintendent of 

 Mines, Breslau, 8. 



APEL, W., Gottingen, 7, 14, 17. 



APPUUN, G., AND SONS, Hanau, 6. 



ASSOCIATION FOR THE MANUFAC- 

 TURE OF ANILINE, Berlin, 13. 



AUGUST, DR. F., Humboldt-Gymna- 

 sium, Berlin, 11. 



BABO, PROF, von (Chemical Labora- 

 tory), Freiburg, Breisgau, 6. 



BACH, DR. O., Leipzig, 13. 



BAEYER, LIEUT.-GENERAL (Presi- 

 dent of the Geodetic Institute), 

 Berlin, 3, 15. 



BALL, Freiburg, Breisgau, 13. 



BAMBERG, C., 158, Linienstrasse, 

 Berlin, 3, 9, 11, 14, 15. 



BAU-DEPUTATION, Hamburg, 15. 



BAUER, PROF. DR. A., Polytechnic 

 Institute, Vienna, 8. 



BAUERNFEIND, PROF. DR. von 

 (Geodetic Institute, Royal Poly- 

 technic School), Munich, 15. 



BAUR AND HAEBE, Stuttgart, 1O, 

 14. 



BECKER, AUG. (DR. MEYERSTEIN'S 

 Workshops), Gottingen, 7, 18. 



BEETZ, PROF. DR. (Polytechnic 

 School), Munich, 3, 8, 1O, 18. 



BERGGEWERKSCHAFTSKASSE (Dr. 

 Heintzmann), Bochum, 3, 11, 

 12, 13, 16, 19. 



BERLIN, PHYSICAL INSTITUTION OF 

 (Dr. Helmholtz), 9. 



BERNSTEIN, A., AND Co., 50, Mark- 

 grafen Strasse, Berlin, 3. 



BERNSTEIN, PROF. (Director), Phy- 

 siological Institute, University oj 

 Halle, 3. 



BEZOLD, PROF. W. von (Poly- 

 technic School), Munich, 3, 7, 1O. 



BIEDERMANN, DR. R., Berlin, 13. 



BLATTNER, C. (Polytechnic School), 

 Munich, 7. 



BLATZBECKER, Dr. A. A., Cologne, 

 13. 



BOCK AND HANDRIK, 2, Falken- 

 strasse, Dresden, 2, 12. 



BOHN, PROF. DR., Aschaffenburg, 5, 

 14. 



BONSACK, A., Berlin, 3, 15. 



BORCHARDT, PROF., Berlin, 2. 



BORCHARDT, E., 37, Heinrichstrasse , 

 Hanover, 1O. 



BRAUN, DR. O., Berlin, 12. 



BREITHAUPT, J. W., AND SON, 

 Cassel, 3, 11, 15, 16, 17. 



BRENDEL, R., Kurfiirstendamm, 

 Berlin, 18. 



BRESLAU COMMITTEE FOR THE 

 SCIENTIFIC APPARATUS EXHIBI- 

 TION, LONDON, Breslau, 2, 3, 8, 

 11, 13, 14, 18. 



BRILL, PROF. DR. (Polytechnic 

 School), Munich, 2. 



BROCKING, W., Hamburg, 3. 



BRUHNS, PROF. DR., Leipzig, 11. 



BUCHLER, J. H v Breslau, 13. 



BUFF, PROF. DR., Giessen,3, 4, 7, 1O 



BUNGE, P., Hamburg, 3. 



CARL AND HOMANN, Nuremberg, 15. 



