148 



ON THE PERIODICITY OF THE AURORA BOREALIS. 



Apr. 7. 



Lefroy. 



Chandler. 

 Lefroy. 



Lefroy. 



Johnson. 



New York. Hough. 



Quebec and Montreal. Lefroy. 



Kingston, Toronto, and London. 



Christiania. Hansteen. 



Montreal and Kingston. Lefroy. 



Cambridge. Bond. Lovering. 



New York. Hough. Worcester. 



Montreal, Kingston, and Toronto. 



Christiania. Hansteen. 



Kingston. Lefroy. 



Quebec. Lefroy. Christiania. Hansteen. 



Makerstoun. Broun. 



Quebec. Lefroy. 



Kingston, Halifax, and Toronto. Lefroy. 



Christiania. Hansteen. 



Toronto and London. Lefroy. 



Toronto. Lefroy. Inveresk. Broun. 1 



Quebec ? Lefroy. 



New Haven. Herriek. Newton and Loomis. 



New York. Hough. Newberry. Johnson. 



Quebec and Montreal. Lefroy. 



Kingston, Toronto, and London. 



Makerstoun. Broun. 



New York. Hough. Newberry. 



Quebec and Montreal. Lefroy. 



Kingston and Toronto. Lefroy. 



Toronto. Lefroy. 



Quebec. Lefroy. 



Montreal, Kingston, and Toronto. 



Quebec and Toronto. Lefroy. 



Makerstoun. Broun. 



New York. Hough. 



Quebec and Toronto. Lefroy. 



New Haven. Herriek. Newton and Loomis. 



New York. Hough. 



Quebec and Kingston. Lefroy. 



Makerstoun. Broun. 



Kingston. Lefroy. 



Worcester. Chandler. 



Kingston, Toronto, and London. Lefroy. 



Cambridge. Bond. Lovering. 



Kingston and Toronto. Lefroy. 



Toronto. Lefroy. 



New Haven. Herriek. Newton and Loomis. 



Cambridge. Bond. Lovering. 



New Haven. Herriek. Newton and Loomis. 



New York. Hough. Providence. Caswell. 



Kingston, Toronto, and London. Lefroy. 



i Trans. Roy. Soc. Edinb. XIX. Pt. II. p. lxxix. 



Lefroy. 



June 1. 



New York. Hough. 



New York. Hough. 



Montreal and Kingston. Lefroy. 



Kingston. Lefroy. 



Kingston. Lefroy. 



New Haven. Herriek. Newton and Loomis. 



Toronto. Lefroy. 



London, Canada West. Lefroy. 



Quebec, Kingston, and Toronto. Lefroy. 



Edinburgh. Boue. Inveresk. Broun. 



Edinburgh. Boue. Inveresk. Broun. 



New Haven. Herriek. Newton and Loomis. 



New York. Hough. 



Kingston, Toronto, and London. Lefroy. 



New Haven. Herriek. Newton and Loomis. 



New York. Hough. Worcester. Chandler. 



Kingston and Toronto. Lefroy. 



Kingston. Lefroy. 



Cambridge. Bond. Lovering. 



Quebec and Montreal. Lefroy. 



Cambridge. Bond. Lovering. 



Worcester. Chandler. 



Xiir Ilaren. Herriek. Newton and Loomis. 



New York. Hough. Providence. Caswell. 



Kingston and Toronto. Lefroy. 



New York. Hough. 



New Haven. Herriek. Newton and Loomis. 



New York. Hough. Inveresk. Broun. 



London, Canada West. Lefroy. 



London, Canada West. Lefroy. 



Kingston. Lefroy. 



Kingston. Lefroy. 



Montreal and Kingston. Lefroy. 



Montreal. Lefroy. 



Christiania. Hansteen. 



New Haven. Herriek. Newton and Loomis. 



New York. Hough. Toronto. Lefroy. 



Quebec, Montreal, and Kingston. Lefroy. 



Christiania. Hansteen. Inveresk. Broun. 



New York. Hough. 



New York. Hough. 



Franconia, N H. Hough. 



Portsmouth, England. Hough. 



New York. Hough. 



New Haven. Herriek. Newton and Loomis. 



New York. Hough. Newberry.- Johnson. 



Quebec and Montreal. Lefroy. 



Kingston, Toronto, and London. Lefroy. 



Christiania. Hansteen. 



New Haven. Herriek. Newton and Loomis. 



