MYtriS — ON METEOROLOGY. 51 



third — these cases are more rare — it forms a plane, or leaf, in the 

 middle of the lode. Again, it will be mostly found in the slate 

 " casing" of the vein, and not in the quartz itself. In most cases 

 which have come under my notice, however, the gold is scattered 

 throughout the thickness of the quartz and casing ; and is sometimes 

 quite invisible to the naked eye. Until very recently, it has almost 

 invariably been found that quartz lodes became richer in gold as 

 they descended. Facts have lately come under my notice which 

 tend to show either that this rule does not apply to all lodes, or 

 that at least it does not apply to all beyond a certain depth. 



I would like to conclude with some remarks upon the theories, 

 ■which have been offered to the world as to the origin of gold in 

 quartz ; but to do so with any justice to the subject at all, would 

 extend this paper to unreasonable limits.* I will only now say, 

 with some hesitation indeed, and with all deference to the opinions 

 of the many learned men who have discussed the subject, that the 

 quartz veins of Nova Scotia, on a careful examination of them, seem 

 to me to present serious difficulties, to the adoption of the theory 

 that gold was deposited there from aqueous solution ; and also to 

 the adoption of the opposing theory, that its presence there is the 

 result of igneous action. I suspect, perhaps with improper incredu- 

 lity — that the secret of the formation of auriferous quartz deposits, 

 yet remains to be divulged. 



Art. VI. Notes ox the Weather at Halifax, Nova Scotia, 

 DURING 1865. By Colonel Myers. 



[Read Dec. 4, 1865.] 



The cold of the winter of 1864—5, seems for the most part to 

 have expended itself during the latter part of December, 1864; 

 and January, 1855, began, and continued throughout, mild and 

 serene. The mean temperature was 22°, one degree less than that 

 recorded on the same month of the previous year. 



High winds prevailed during February, but the weather gener- 

 ally fine and mild for that month. Mean temperature 24°, being 

 2° less than in 1864. 



*Per1iaps I may, in some future paper, recur to this brancli of tlie subject, 

 which must be by far the most interesting to the scientific tnind; but it is the most 

 perplexing to deal with. 



