462 . Captain Lefroy's Preliminai-y Iteport on 



precision to the rough calculation attempted above of the per- 

 centage of nights in which it is seen, to nights in which it 

 could be seen if it occurred. The expression "fine night" is 

 ambiguous. In any statement of this kind, the point to be 

 chiefly referred to is the condition of the northern half of the 

 sky — the rest is of little consequence. I should be obliged 

 by a memorandum on the next register of the nature of the 

 look-out at each station, and how nearly down to the horizon 

 the view from N.E. to N.W. extends; some difference in this 

 respect is perhaps the reason why the observations are more 

 numerous at some stations than at others. 



Dates of all the observations included in the foregoing 

 comparison. The stations are expressed by their initials : — 

 N., Newfoundland ; Q., Quebec ; M., Montreal ; H., Hali- 

 fax; K., Kingston; T., Toronto; L., London, C.W.; P., 

 Penetanguishene; F., Fenelon Falls; B., Bruce Mines, Lake 

 Huron. The last three are additional stations, from which 

 I have been favoured with communications : — 



1848. 



