1883. 13 Trans. JV. V. Ac. Sci. 



nolite or byssolite, and containing glittering rows of small cavities filled 

 with liquid. It was only valuable as a mineralogical specimen for 

 cabinet purposes, and was worth for such use about $5. 



Mr. KuNZalso reported on the "Georgia Marvel," or the "Blue Ridge 

 Sapphire," as it is called, which was found a little over a year ago in a 

 brook in that State. The stone weighed about half an ounce, and was 

 supposed to be worth about $50,000. Its discovery created even more 

 interest than did that of the North Carolina emerald. Two well-known 

 Southern jewellers asserted that it was genuine, and it was sent here 

 for a crucial test. Mr. KUNZ said that after a short examination he 

 found it to be a piece of blue bottle-glass, which had been rolled in the 

 brook until the action of the water and gravel had polished it to un- 

 usual brilliancy ; and he was obliged to glaze or enamel a piece of 

 platinum wire with a fragment of the "sapphire" to convince the 

 owner that it was glass. 



He also exhibited fine crystals of limpid topaz, from Pike's Peak, 

 Colorado, said to have been found in association with the amazon-stone 

 and phenakite of that locality. 



Dr. Newberry exhibited and gave some description of a large col- 

 lection of typical fossil fishes and leaves gathered by Mr. Wilson 

 from the Central Rocky Mountains, at a locality about seventy miles 



north of the Union Pacific Railway, near Green River, Colorado. 

 With these were associated a few fossil plants, including a fan palm, 



and many insects. They occurred in a fresh-water shaly limestone of 



Eocene age, occupying a part of the Green River basin, the whole 



formation being 2,500 feet in thickness. 



In reply to an inquiry by Prof. MARTIN, he further stated that the 



insects found in the deposits at Florissant, Col., are more recent ; 



these also include two species of birds, many plants, etc., which are 



evidently of later date than the fossils on exhibition. 



Dr. N. L, Brixton then spoke on the subject of 



NOTES ON THE COPPER MINING REGION OF 1,'AKE SUPERIOR. 



The succession, probable stratigraphical relationship, and lithological 

 characteristics of the rocks and veinstones of the region were described 

 in detail, and illustrated by diagrams and a series of specimens col- 

 lected during a visit of the past summer. 



DISCUSSION. 



Prof. O. P. Hubbard stated that the first steamboat which navi- 

 gated Lake Superior was drawn across the straits at the Sault in the 

 year 1849. It was curious that this date was preceded in Russia, since 

 the first steamboat navigated Lake Vega in the year 1842. 



