280 



ON THE PERIODICITY OF THE AURORA BOREALIS. 



8. 

 8. 

 9. 



10. 



10. 



11. 



11. 



11. 

 " 13. 

 " 15. 

 " 15. 

 " 15. 

 " 19. 

 " 22. 

 " 23. 

 " 23. 

 " 24. 

 " 24. 

 " 24. 

 " 24. 

 " 25. 

 " 25. 

 " 26. 

 " 26. 

 " 26. 

 " 28. 

 *Sept. 2. 

 « 3. 



Toronto, Montreal. Lefroy. 



Penetanguishene. Lefroy. 



Kingston, Toronto, Halifax. Lefroy. 



Montreal, Halifax. Lefroy. 



Penetanguishene. Lefroy. 



Halifax, Kingston. Lefroy. 



Portage la loche. Lefroy. 



Penetanguishene. Lefroy. 



Clear Water River. Lefroy. 



Toronto. Lefroy. 



Athabasca Biver. Lefroy. 



Halifax ? Lefroy. 



Fort Simpson. Lefroy. 



Fort Simpson, Slave Biver. Lefroy. 



Portage Brule. Lefroy. 



Sail Biver, drifting below. Lefroy. 



Penetanguishene, Grosse Isle. Lefroy. 



Quebec, Montreal, Toronto. Lefroy. 



Salt Biver, drifting beloiv. Lefroy. 



Fort Resolution, Halifax. Lefroy. 



At Sea, Ship Pig mouth Rock, Lat. 47° N. 



Smithsonian Records. [Lg. 21° TV. 



Slave Lake, Quebec. Lefroy. 



Big Island, Grosse Island, Quebec. Lefroy. 



Penetanguishene, Toronto. Lefroy. 



Near Fort Simpson, Montreal. Lefroy. 



Penetanguishene, Toronto. Lefroy. 



Grosse Isle, Quebec. Lefroy. 



Quebec. Lefroy. 



Quebec. Lefroy. 



At Sea, ShipTorktoion,Li. 42° N. Lg.51 a W. 



Smithsonian Record. 



Quebec. Lefroy. 



Lefroy. 



Lefroy. 

 Lefroy. 



Lefroy. 



AtSea,ShipAshburlon,Lt. 40° N. Lg. 65° W. 

 At Sea. Ship Plymouth Rock, Lat. 44° N. 

 Smithsonian Records. [iy. 53^° W. 



Leivis and Petty, Toronto. Lefroy. 

 Penetanguishene. Lefroy. 

 Toronto. Lefroy. [Lg. 58° W. 



At Sea, Ship Plymouth Rock, Lat. 43° N. 

 Smithsonian Records. 

 Fort Simpson, Toronto. Lefroy. 

 Petty River, 120 ms. below Ft. Selkirk. Lef. 

 Grosse Isle, Toronto. Lefroy. 



Letois and Petty. 

 Leivis and Petty. 

 Toronto, Halifax. 

 Lewis and Petty. 



Sept. 3. 



Penetangii/ishenK, Lefroy. 



Fort Simpson, Grosse Isle, Quebec. Lefroy. 



Penetanguishene, Toronto. Lefroy. 



Petty River, Fort Simpson. Lefroy. 



Fort George, Penetanguishene. Lefroy. 



Petty River, Peel's River, Toronto. Lefroy. 



Fort George, Penetanguishene. Lefroy. 



Petty River, Fort Simpson. Lefroy. 



Penetanguishene. Lefroy. 



Petty River, Fort Simpson. Lefroy. 



Petty Biver, Peel's River. Lefroy. 



Fort Simpson, Fort George. Lefroy. 



Grosse Isle, Quebec. Lefroy. 



Peel's Biver, Fort Simpson. Lefroy. 



Fort George, Toronto. Lefroy. 



Peel's Biver, Fort Simpson. Lefroy. 



Fort George. Lefroy. Gt.Britain. Glaisher. 



Fort Simpson, Toronto. Lefroy. 



Quebec. Lefroy. 



Petty River. Lefroy. 



Petty River, Peel's River, Toronto. Lefroy. 



Montreal, Penetanguishene. Lefroy. 



Peel's River, Penetanguishene. Lefroy. 



Toronto, Quebec. Lefroy. 



Montreal. Lefroy. Gt. Britain. Glaisher. 



Peel's River, Fort Simpson. Lefroy. 



Grosse Isle, Quebec. Lefroy. 



Montreal. Lefroy. Great Britain. Glaisher? 



Peel's River, Fort Simpson. Lefroy. 



Penetanguishene, Toronto. Lefroy. 



Kingston. Lefroy. Gt. Britain. Glaisher ? 



Petty Biver, Peel's Biver. Lefroy. 



Fort Simpson, Quebec. Lefroy. 



Halifax. Lefroy. Great Britain. Glaisher ? 



Petty River, Peel's River. Lefroy. 



Fort Simpson, Fort George. Lefroy. 



Toronto, Kingston. Lefroy. 



Halifax. Lefroy. Gt. Britain. Glaisher ? 



Petty River, Fort George. Lefroy. 



Toronto, Halifax. Lefroy. 



Fort Simpson. Leftoy. 



Quebec. Lefroy. 



Peel's River, Grosse Isle. Lefroy. 



Toronto, Quebec, Halifax. Lefroy. 



Fort Simpson, Peel's River. Lefroy. 



Petty Biver. Lefroy. 



Fort Simpson, Quebec, Toronto. Lefroy. 



Fort Simpson. Lefroy. 



