Geology and Mineralogy. 233 



below the sea-level and yields more than one ounce per ton. In 

 1874, 6,725 tons of auriferous pyrites yielded 18,911 ounces of 

 gold. 



The vegetable fossils described by Baron F. v. Mueller are 

 fruits, of kinds unlike existing Australian species, and all are 

 referred to new genera. They come mostly from the auriferous 

 drifts at a depth of about 150 feet, and are referred to the " Plio- 

 cene." They include fruits of Spondylostrohm, cypress-like con- 

 ifers; of Trematocaryon, supposed to be related to the Verbena- 

 ceae ; of Rhytidotheea, allied to Chloroxylon ; of Plesiocapparis^ 

 near Capparis ; of Celphina, supposed to be Proteaceous and 

 most allied to Helicia of East and North Australia ; Odontocaryoriy 

 not referred to any natural order, the author " being unaware of 

 --T existing or extinct genus to which it bears really close 



Conchotheca, having fruit like that of Grevillcag, but 

 ertainly Proteaceous ; of Fenteune, a large nut, but of doubt- 

 ilations ; of Dieane, perhaps related to Capparidese or Pitto- 

 ; of Platycoila, of doubtful relatioi 



8. Glacier phenomena along the Kittatinny or Blue I 

 in Carbon^ Northampton and Monroe Cos., Pennsyhmnia. — Mr. 

 C. E. Hall describes extensive deposits of gravel and bowlders 

 south of the Lehigh Gap and along the Lehigh River ; and also at 

 Wind Gap, and the Delaware Water Gap. Four miles from the 

 mouth of Marshall's Creek, on the road to Craig's Meadow, there 

 are scratches on the Oriskany sandstone, having the direction 

 S. 28° W. — which is toward the gap, following the course of the 

 river. Mr. Hall also shows that the gravel deposits in and about 

 the city of Philadelphia are glacial. Between Spruce and Walnut 

 streets, west of Forty-fifth street, bowlders of Oneida conglomerate, 

 Medina sandstone, and of other rocks, have been exposed to view 

 which vary from one to twenty-five cubic feet in size, some of them 

 glacier-scratched. He mentions also other localities of bowlders 

 within the city limits.— Proc. Amer. Phil. Soc, xiv (No. 95), pp. 

 620 and 633, 1876. 



9. Wisconsin Geological Survey.— The Report on the Geological 

 Survey of Wisconsin is ready for the press and awaits only the 

 action of the legislature. A prospectus of its contents shows that 

 It contains a large amount of valuable material. Prof T. C. Cham- 

 berlin, of Detroit, has been placed at the head of the Survey for 

 the present year. 



10. Frequency of Earthquakes relatively to the age of the Moon. 

 —Prof Alexis Pekbey continues his study of earthquakes, and 

 has recently published in the Comptes Rendus a new statement 

 as to the relation between the age of the moon and the frequency 

 of earthquakes.* Dividing the period of a lunation into quarters, 

 with the time of the syzigies, and quadratures as the centers of 

 these quarters, he finds that the earthquakes are distributed as 

 follows : 



