Caplaui Lefroy's Preliminarij Report on 



■Qriifnon 



1849 {continued). 



I will only add, that these ob.servations promise to furnish 

 a valuable body of information respecting the aurora, and will 

 have a very important bearing on the observations to which 

 the establishment at Toronto is devoted. While, therefore, 

 I take this occasion of conveying my thanks to my brother 

 officers, and to the non-commissioned officers of the regiment, 

 for their assistance, I beg to renew my request that the 

 system be persevered in. 



,J. H. Lefroy. 

 Magnetical Observatorj', 

 Toronto, 27th March 1850. 



Insirnctions of Observations of the Aurora*. 



Non-commissioned officers on guard have an opportunity 

 of observing at every second hour whether any aurora is 

 visible; and by encouraging the more intelligent of the men, 

 when their posts are favourably situated for the purpose, to 

 notice and to report any display of short duration which may 



• The original instructions are here extended and improved by the in. 

 corporation of some particuhu's from those issued by the Smithsonian In- 

 stitute. 



