Xll 



INTRODUCTION. 



ITALY. 



II Com. Blaserna, Professor of Phy- 

 sics and Kector of the Royal Uni- 

 versity of Rome. 



II Com. Cantoni, Professor of Phy- 

 sics at the Royal University of 

 Pa via. 



II Cav. Respighi, Professor of Astro- 

 nomy in the Royal University of 

 Rome, and Director of the Obser- 

 vatory of the Campidoglio. 



THE NETHERLANDS. 



Professor Dr. P. L. Rijke, Conseiller 



d'etat (President). 

 Professor Dr. H. G. de Sande Bak- 



huyzen. 



Professor Dr. C. II. D. Buys Ballot. 

 Professor Dr. J. Bosscha. 

 Professor Dr. F. C. Donders, F.R.S., 



President of the Royal Academy of 



Science, Amsterdam. 



der 



Professor Dr. J. W. Gunning. 



Professor Dr. R. A. Mees. 



Professor Dr. V. S. M. Vaii 

 Willigen. 



Dr. D. de Loos, Director of the Se- 

 condary Town-School of Leydeii 

 (Secretary). 



NORWAY. 



Professor Esmaik. 



Herr Mohn, Director of the Meteoro- 

 logical Institute of Norway. - 



Professor Waage. 



RUSSIA. 



M. Struve, Conseiller Prive, Directeur 

 de 1'Observatoire Central Nicolas 

 (President). 



M. Ovsiannikow, Membre de 1' Aca- 

 demic. 



M. Gadolin, Membre de 1' Academic. 



M. Gruber, Professeur de 1' Academic 

 de Medecine et de Chirurgerie. 



M. Stubendorf, Colonel d'Etat-Major. 



M. Wyschnegradsky, Professeur de 



1'Institut technologique. 

 M. Beilstein, Professeur de 1'Institut 



technologique. 

 M. Barbot dc Marny, Professeur de 



1'Institut des Mines. 

 M. Koulibine, Professeur de 1'Institut 



des Mines. 



SWITZERLAND. 



Professor E. Wartmann (President). 

 Professor J. Amsler Laffon. 

 Professor D. Colladon-Ador. 

 Professor Dr. F. A. Forel. 



Professor Ad. Hirsch. 

 Professor Albert Mousson. 

 M. E. Sarasin-Diodati. 

 Professor L. Soret. 



Professor Dr. E. Hagenbach-Bischoff. Colonel Gautier (Secretary). 



AUSTRIA AND HUNGARY. 



The Minister of Public Instruction has appointed Sectionschef Fidler to 

 organise the contributions from these countries. 



SPAIN. 



No committee has been formed, but the Government has promised to contri- 

 bute, and Senor Riano has been specially appointed to make the necessary 

 arrangements. 



