Delegates
| Name | Designation | on behalf of ... |
|---|---|---|
| Baron Ignatz von Schaeffer | Envoy Extraordinary and Minister Plenipotentiary | Austria-Hungary |
| Dr. Luís Cruls | Director of the Imperial Observatory of Rio de Janeiro | Brazil |
| Commodore S. R. Franklin | U.S. Navy, Superintendent U.S. Naval Observatory | Colombia |
| Mr. Juan Francisco Echeverria | Civil Engineer | Costa Rica |
| Mr. A. Lefaivre | Minister Plenipotentiary and Consul-General | France |
| Pierre Janssen | Director of the Physical Observatory of Paris | France |
| Baron H. von Alvensleben | Envoy Extraordinary and Minister Plenipotentiary | German Empire |
| Captain Sir F. J. O. Evans | Royal Navy | Great Britain |
| Prof. J. C. Adams | Director of the Cambridge Observatory | Great Britain |
| Lieut.-General Richard Strachey | Member of the Council of India | Great Britain |
| Mr. Sandford Fleming | representing the Dominion of Canada | Great Britain |
| M. Miles Rock | President of the Boundary Commission | Guatemala |
| Hon. W. D. Alexander | Surveyor-General | Hawaii |
| Hon. Luther Aholo | Privy Counsellor | Hawaii |
| Count Albert de Foresta | First Secretary of Legation | Italy |
| Professor Kikuchi Dairoku | Dean of the Scientific Department of the University of Tokyo | Japan |
| Mr. Leandro Fernandez | Civil Engineer | Mexico |
| Mr. Angel Anguiano | Director of the National Observatory of Mexico | Mexico |
| Captain John Stewart | Counsul-General | Paraguay |
| Mr. C. E Struve | Envoy Extraordinary and Minister Plenipotentiary | Russia |
| Major-General Stebnitzki | Imperial Russian Staff | Russia |
| Mr. J. de Kologrivoff | Conseiller d'État actuel | Russia |
| Mr. M. de J. Galvan | Envoy extraordinary and Minister Plenipotentiary | San Domingo |
| Mr. Antonio Batres | Envoy extraordinary and Minister Plenipotentiary | Salvador |
| Mr. Juan Valera | Envoy Extraordinary and Minister Plenipotentiary | Spain |
| Mr. Emilio Ruiz del Arbol | Naval Attaché to the Spanish Legation | Spain |
| Mr. Juan Pastorin | Officer of the Navy | Spain |
| Count Carl Lewenhaupt | Envoy Extraordinary and Minister Plenipotentiary | Sweden |
| Colonel Emile Frey | Envoy Extraordinary and Minister Plenipotentiary | Switzerland |
| Rear-Admiral C. R. P. Rodgers | U.S. Navy | United States |
| M. Lewis Morris Rutherfurd | United States | |
| Mr. W. F. Allen | Secretary Railway Time Conventions | United States |
| Commander W. T. Sampson | U.S. Navy | United States |
| Professor Cleveland Abbe | U.S. Signal Office | United States |
| Señor Dr. A. M. Soteldo | Chargé d'Affaires | Venezuela |
| Mr. Francisco Vidal Gormaz | Director of the Hydrographic Office | Chile |
| Mr. Alavaro Bianchi Tupper | Assistant Director | Chile |
| Mr. Carl Steen Andersen de Bille | Minister Resident and Consul-General | Denmark |
| Mr. Hinckeldeyn | Attaché of the German Legation | Germany |
| Mr. William Coppinger | Consul-General | Liberia |
| Mr. G. de Weckherlin | Envoy Extraordinary and Minister Plenipotentiary | Netherlands |
| Rustem Effendi | Secretary of Legation | Ottoman Empire |
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