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DANEMARK. 
Copenhague. — Tidskrift for Mathematik : D' H. G. ZEUTHEN, 
professeur à l’université. 
Académie royale des sciences. 
SUISSE. 
Berne. — Vaturforschende Gesellschaft. 
Société helvétique des sciences naturelles. 
Neuchâtel. — Societé des sciences naturelles. 
Schafhouse. — VNuturforschende Gesellschaft. 
AMERIQUE. 
ÉTATS-UNIS. 
American Association for advancement of sciences. 
Baltimore. 
American Journal of mathematics. 
Johns Hopkins University. 
Boston. 
American Academy of arts and sciences. 
Society of natural History. 
Cambridge. — Museum of comparative zoology. 
Columbus. — Ohio State agricultural Society. 
Nadison. 
Wisconsin Academy of sciences, letters and arts. 
New-Haven. — Connecticut Academy of arts and sciences. 
Newport. 
Orleans County Society of natural sciences. 
New-York. — Academy of sciences. 
Philadelphie. — Academy of natural sciences. 
American philosophical Society. 
Wagner Free Instilute of sciences. 
Portland. 
Natural History Society. 
Salem. — The American Naturalist. 
Essex Institule. 
Peabody Academy of sciences. 
San-Franciseo. — Californian Academy of sciences. 
Washington. — Smithsonian Institution. 
