260 



the native Copper from Isle Royale, from a vein 350 feet 

 below the surface, where the metal, having been cooled 

 under vast pressure, might be expected to be of a propor- 

 tionate density ; on comparison with other specimens, the 

 specific gravity was : 



Specimen from the cliff at Keweenaw Point . 893.18 

 Hammered copper ...... 889. 



Native copper, under ordinary circumstances . 858.40 



Mr. J. E. Teschemacher exhibited a specimen of Anthra- 

 cite Coal, on which was a mass of carbonized wood perfectly 

 structural ; in the centre of this mass ran a number of jointed 

 vessels (?), spreading out in various directions; other masses 

 on this specimen contained vessels also. 



Mr. T. also stated, that after careful examination of numerous 

 specimens, he had been forced to the conclusibn that many of the 

 appearances in the anthracite coal must be due to the growth of 

 fungi during the coal epoch ; tha,t many specimens exhibited 

 what might easily be interpreted as Mycelia, and that the investi- 

 gation of the decarbonized matter seemed to him strongly to 

 support this view, which, in presenting a lower order of vegeta- 

 tion at that period, would accord with the plan exhibited in other 

 existences. One form agrees remarkably with a figure of Hus- 

 seia, a new fungus, given by Sir W. J. Hooker in a late Number 

 of the Journal of Botany. He stated that he had, within a f^w 

 days, discovered several more specimens of the vegetable forms 

 found in the Shale, including some of the rarest ; and that in 

 others he had found the interior of large stems as carbonized 

 matter, which, if it proves still to retain its original structure, as 

 it appears to do, will no doubt throw light on the analogy of the 

 co^l vegetation to that of the present period. 



Mr. Desor exhibited a sketch, by Mr. Edward C. Cabot, 

 of the remarkable parallel trains of Boulders in Berkshire 

 County, Massachusetts, lately described by Prof. Rogers in 

 the Society's Journal. 



Mr. D. called attention particularly to the fact that the trains 

 consisted of angular boulders, resting, in parts of their route, upon 

 rounded drift pebbles. Similar facts were common in Switzer- 

 land ; but so far as hitherto observed, rare in this country. He 



