11 
List op Exchanges. 
The Canadian Institute, Toronto, Canada. 
Natural History Society, Montreal, Canada. 
Sociedad Cientifica, “Antonio Alzate,” City of Mexico, Mexico. 
Observatorio Astrondmico Nacional de Tacumbaya, Mexico. 
Cambridge Philosophical Society, Cambridge, England. 
The Ro} r al Society, London, England. 
The Royal Geographical Society, London, England. 
The Geographical Journal. 
The Manchester Literary and Philosophical Society, Manchester, Eng. 
The Royal Society of Edinburgh, Edinburgh, Scotland. 
Royal Dublin Society, Dublin, Ireland. 
Natural History and Philosophical Society, Belfast, Ireland. 
L’Academie Royale des Sciences, des Lettres, et des Beax-Arts, Brux¬ 
elles, Belgium. 
La Societe Hollandaise des Sciences a Harlem, Holland. 
L’Academie des Sciences, Inscriptions et Belles-Lettres, Toulouse, 
France. 
El Progreso Matematico, Zaragoza, Spain. 
Naturforschende Gesellschaft, Zurich, Switzerland. 
R. Accademia delle Scienze, Torino, Italy. 
Societa Toscana di Scienze Naturali, Pisa, Italy. 
R. Academia delle Scienze, Bologna, Italy. 
Circolo Matematico di Palermo, Italy. 
Kaiserliche Akademie der Wissenschaften, Wien, Austria. 
Der Koenigl-boehmischen Gesellschaft der Wissenschaften, Prag, Bo¬ 
hemia. 
Berliner Gesellschaft fur Anthropologie, Ethnologie, und Urgeschichte, 
Berlin, Germany. 
Societe Physico-Mathematique de Kasan, Kasan, Russia. 
The Geological Institution of Upsala, Sweden. 
Kongl. Vetenskaps Akademiens, Stockholm, Sweden. 
