202 



Robert Fletcher, Charles Carruth, Isaac Sweetzer and 

 Reuben S. Denny, were elected Resident Members. 



February 18, 1863. 



The President in the chair. 



Prof. Wm. B. Rogers read a letter from Joshua Bates, 

 Esq., of London, announcing the shipment of the cast of the 

 Megatherium lately presented by him to the Society. 



Mr. F. W. Putnam exhibited two species of spider which carry 

 their young on their back. Of one he had captured 185 young indi- 

 viduals with their parent, and a few others had made their escape ; 

 of the other there were but 10 or 12 of the young. 



Dr. C. T. Jackson gave an outline sketch of the great copper- 

 bearing belt of Canada, and alluded to the importance of the geologi- 

 cal labors of Sir William Logan, who has described the various 

 anticlinal and synclinal axes of the strata, wliich serve as guides in 

 tracing the copper-bearing beds. Most, if not all, the copper ores of 

 Canada are found to be imbedded or interstratified with the rocks, 

 and are of the middle or lower Taconic series. 



There are two great classes of mines: First, those in dolomitic 

 limestone ; second, those in the nacreous or talco-argillaceous slates. 

 The first consists of large bunches and reticulated veins of copper 

 ore, often giving to the limestone rock the appearance of a breccia of 

 the rock and copper ore. Acton Copper Mine presents the largest of 

 these deposits, and that mine has yielded an enormous amount of rich 

 copper ores, which have all been smelted in the furnaces of this 

 country. 



Harvey Hill Mine, In Leeds, is the deepest mine in Canada, the 

 shafts being 180 feet deep. This mine is a " Slate Mine," or presents 

 the copper ores interstratified with the nacreous slate rocks. 



The ores at both the Acton and Harvey Hill Mines are of the same 

 kinds, namely, erubescite, mixed in variable proportions with copper 

 glance and yellow copper pyrites ; but the variegated copper ore is 

 the most abundant, and is the richest; 



Sutton Copper Mines are exactly like those of Harvey Hill, and 

 are in nacreous talco-argillaceous slate rocks, and interlaminated 

 with their strata. 



Canada East is very rich in copper, and has also some important 

 gold mines, — those in the Seignieurie Vaudreuil, at the Falls of the 



