i 



CONTENTS. 



No. 1. — Notey on the Geology of the Iron and Copper Distriets of Lake Supe- 

 rior. By M. E. Wadswoktu. (0 Tlutes) 



No, 2. — The Eelsiles and their Associated Koclcs, North of Boston. By J. S. 



Page 



DiLLISR 



166 



No. 3. — On an Occurrence of Gold in Maine. By M. E. WAiJSw'oiiTit . . 181 



No. 4. — A Microscopical Study of the Iron Ore, or Poridolite of Iron-Mine 

 Hill, Cumberland, Rhode Islaud. By M. E. Wadswouth .... 183 



No. 5. — Observations upon the Physical Gcogniphy and Geology of Mount 

 Ktaadn. By C. E. Hamlin. (2 Plates) 



. 189 



No. G. 



-Keport on the Peccnt Additions of Eossil Plants to the Museum Col- 

 lections. By LliO EEHQUlilUEUX .... 



. 225 



No. 7. — The Great Dike at Hough's Neck, Qniucy, Mass. By John Eliot 



WOLIF 



231 



No. 8. — On some Specimens of Permian Eossil Plants from Colorado. By 

 Leo Llsquerkux ..... 



. 243 



No. 0. — On the Relations of the Triassic Traps and Sandstones of the Eastern 

 United States. By William Mouuia Davis. (3 Plates) 



. 249 



No. 10. 



-'I he Folded ITcIderberg Limestones, East of the Catskills. By 

 William Moiims Davis. (2 males) 



. Sll 



No. lI. — ThG Azoic System and its Proposed Subdivisions. By J. D. 

 Whitney and M. E. Wadswoutu 





