No. I.] GEOLOGY AND MINERALOGY. 51 



Copper-bearing series, and although it has been worked to a 

 depth of 150 feet below the surface, no trouble has yet been 

 experienced from flooding. Up to the middle of last summer 

 about one million dollars' worth of silver has been taken from this 

 mine. Various other silver-bearing veins and mines in rocks of 

 this age were described briefly, but the space at our disposal will 

 only allow of the bare mention of their names. Suffice it to say 

 that the Algoma, Silver Harbor, Thunder Bay Silver mine^ 

 Shuniah, Jarvis Island, McKellar's Island and McKellar's Point 

 deposits were each noticed. In conclusion the lecturer said that 

 the silver veins which intersect trappean rocks belong to two sets, 

 one of which have a N. E. and the other a N, W. direction. 



At the close of the lecture a large number of specimens of the 

 rocks of the district in question were exhibited and their pecu- 

 liarities explained by Prof. Bell. 



Mr. A. R. C. Selwyn brought for comparison a series of gold- 

 bearing rocks from Australia. Some of these were evidently of 

 Lower Silurian age, and contained graptolites, &c. 



Mr. C. Robb asked whether the Silver Islet dyke had anything 

 to do with the metalliferous character of the vein at that place. 



Prof. Bell said the popular notion was that it had, but that 

 the trials which had been made on other veins crossing the dyke 

 did not support this view. The dyke is peculiar in its composi- 

 tion and contains a number of metals. 



In the course of the discussion v/hicli followed, Mr. Bell sug- 

 gested that if it were desirable to have a shorter name for the 

 Upper Copper-bearing series of Lake Superior, we might adopt 

 that of the Nipigon Group, — J. F. W. — (^Montreal Gazette.') 



Native Iron Discovered by Nordenskiold in Green- 

 land. — The masses of native iron discovered in 1870 by Nor- 

 denskiold at Ovifak in Greenland are especially interesting ; for 

 while on the one hand their mode of occurrence would lead one 

 to consider them as terrestrial, their chemical constitution, though 

 on the whole difl"erent from that of ordinary meteoric iron, in 

 some respects, comes so near to it as to give some ground for con- 

 sidering them as extra-terrestrial. Specimens have been examined 

 by Nordenskiold, Wohler, Diiubree and Berthelot. 



The following is an abstract in a recent number of the Journal 

 of the Chemical Society of a paper on the subject by A. Daubree 

 (Compt. rend., Ixxiv. 1543-1550) : 



