114 



Laumonite, also, occurs in this and in an adjacent calcareous 

 spar vein, and is, doubtless, derived from the chemical combina- 

 tion of the lime of the spar with the siliceous and aluminous in- 

 gredients of the conglomerate and sandstone. Datholite is found 

 in many of the spar veins, in the trap rocks, at Eagle Harbor, 

 Copper Falls and Eagle River, and the crystals of that mineral 

 often include bright scales of metallic copper. The crystals of 

 calcareous spar, and those of Prehnite, also, include bright parti- 

 cles and scales of that metal. This fact must modify our notions 

 as to a slow aqueous infiltration of those minerals into veins and 

 geodes ; for, were it a slow operation, the copper would have 

 become oxidated, which is never the case in any of the instances 

 he had examined. 



Dr. J. took this occasion to state that he had never owned, 

 or been interested in any stock, in any of the Lake Supe- 

 rior or other mines ; and that he had no other object in view, in 

 these statements, than to advance the interests of science, and to 

 aid in the promotion of the legitimate mining operations of this 

 country. He deemed it necessary to make this avowal, because, 

 on some occasions, more unworthy motives had been attributed 

 to him. 



A valuable and extensive donation of skins of mammalia 

 and birds, the skeleton of the lesser ant-eater, and various 

 reptiles, from Dr. Francis W. Cragin, of Surinam, was an- 

 nounced. 



James Lloyd was elected a member of the Society. 



DONATIONS TO THE CABINET. 



Five skeletons of birds, and one of a species of Rana, and 

 twenty-one crania of reptiles, birds and small quadrupeds. From 

 E. W. Code, M. D. 



ADDITIONS TO THE LIBRARY. 



Dana, James D. The Structure and Classification of Zoo- 

 phytes ; being the Introduction to the Volume on Zoophytes, one 

 of the Series of the Voyage of the American Exploring Expedi- 



