( xxn ) 
DANEMARK. 
Copenhague. — Tidskrift for Mathematik : D' H. G. ZEUTHEN, 
professeur à l’université. 
Académie royale des sciences. 
SUISSE. 
Berne. — Vatur/orschende Gesellschaft. 
Société helvétique des sciences naturelles. 
Neuchàâtel. Societé des sciences naturelles. 
Schafhouse. — Vaturforschende Gesellschaft. 
AMÉRIQUE. 
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 comparalive zoology. 
Columbus. — Ohio State agricultural Society. 
Madison. — Wisconsin Academy of sciences, letters and arts. 
New-Haven. — Connecticut Academy of arts and sciences. 
Orleans County Society of natural sciences. 
Newport. 
New-York. 
Philadelphie. — Academy of natural sciences. 
American philosophical Society. 
Wagner Free Institute of sciences. 
Academy of sciences. 
Portland. — Natural History Society. 
Salem. The American Naturalist. 
Essex Institute. 
Peabody Academy of sciences. 
San-Franeiseo. — Californian Academy of sciences. 
Smithsonian Institution. 
WVashington. 
