272 



ON THE PERIODICITY OF THE AURORA BOREALIS. 



April 27 



Dubuque, Iowa. Smith. Records. 

 Fort Chipewyan. Lefroy. 

 Yoncou, Moose Factory. Lefroy. 

 Michipicoton, Halifax. Lefroy. 

 Fort Chipewyan. Lefroy. 

 Moose Factory, Halifax. Lefroy. 

 Fort Chipewyan, Moose Factory. Lefroy. 

 Moose Factory, Quebec. Lefroy. 

 Michipicoton, St. Johns. Lefroy. 

 Hartford, Conn., Lima, Perm. Smith. Kec. 

 Bait, and Ohio Railroad, Md. Smith. Rec. 

 BattleCreek,Mich.,Beloit, Wise. Smith. Rec. 

 Moose Factory. Lefroy. 

 Moose Factory, St. Johns. Lefroy. 

 Michipicoton. Lefroy. 

 Hartford, Conn. Smith. Records. 

 Moose Factory. Lefroy. 

 Hartford, Conn. Smith. Records. 

 Moose Factory. Lefroj T . 

 Moose Factory, Mich ipicoton. Lefroy. 

 Kingston, Toronto. Lefroy. 

 Moose Factory. Lefroy. 

 St. Johns. Lefroy. 

 St. Johns. Lefroy. 

 Moose Factory. Lefroy. 

 Whitehaven, Engl. Lefroy. 

 St. Johns. Lefroy. 

 Moose Factory, St. Johns. Lefroy. 

 Hartford, Conn. Smith. Records. 

 Moose Factory, Michipicoton. Lefroy. 

 Moose Factory. Lefroy. 

 Moose Factory. Lefroy. 

 Somerville, N. Y., Keene, Ohio. Smith. Rec. 

 Moose Factory. Lefroy. 

 Moose Factory ? Lefroy. 

 Moose Factory. Lefroy. 

 Mouth of St. Laicrence. Lefroy. 

 Moose Factory. Lefroy. 

 Moose Factory, Michipicoton. Lefroy. 

 Moose Factory. Lefroy. 

 Moose Factory ? Lefroy. 

 Dalhousie, C. E. Lefroy. 

 London, G. W. Lefroy. 

 Moose Factory, Quebec. Lefroy. 

 Mich ipicoton, Dalhousie. Lefroy. 

 Montreal, Toronto. Lefroy. 

 St. Johns, Mouth of St. Lawrence. Lefroy. 

 Londonderry, N. H. Smith. Rec. t 



jr,'dillebury,Vt.,Ogdensburg, X. Y. Smith. R. 



Springfield, Mass., Neiv Haven, Conn. S. R. 



At Sea, Ship Yorktown, Lat, 39° 53' N. 



Smithsonian Records. [Long. 5'J II. 



Moose Factory, Toronto. Lefroy. 



3Ioose Factory. Lefroy. 



31oose Factory. Lefroy. 



Moose Factory. Lefroy. 



Nottingham, Engl. Glaisher. 



Moose Factory. Lefroy. 



Dalhousie, London. Lefroy. 



Ogdensburg, N. Y. Smith. Records. 



Nottingham, Engl. Glaisher. 



Moose Factory. Lefroy. 



Moose Factory. Lefroy. 



Freeporl, Penn. Lefroy. 



Moose Factory. Lefroy. 



( 'eres, Penn. Lefroy. 



Michipicoton, Toronto. Lefroy. 



Mouth of St. Lawrence. Lefroy. 



Moose Factory, Montreal. Lefroy. 



Concord. N. 11. Smith. Kecords. 



Geres, Penn. Smith. Records. 



Moose Factory. Lefroy. 



Moose Factory, Quebec. Lefroy. 



Moose Factory, London. Lefroy. 



Albion Mines, St. Julius. 



New Harmony, Indiana. 



Michipicoton. Lefroy. 



Moose Factory. Lefroy. 



Moose Factory. Lefroy. 



Moose Factory. Lefroy. 



Quebec ? Toronto ? Lefroy. 



Moose Factory. Lefroy. 



Albion Mines, Toronto. Lefroy. 



Michipicoton, Kingston. Lefroy. 



Londonderry, N. H Lefroy. 



Bloomfield, N. J. Lefroy. 



Moose Factory, Toronto. Lefroy. 



Moose Factory, Michipicoton. Lefroy. 



Moose Factory. Lefroy. 



Quebec, Montreal. Lefroy. 



Moose Factory. Lefroy. 



Moose Factory, Michipicoton. 



Michipicoton. Lefroy. 



Kingston, Toronto. Lefroy. 



Old Town, Maine. Lefroy. 



Moose Factory. Lefroy. 



Lefroy. 



Smith. Records. 



Lefroy. 



