CATALOGUE OF A SELECT COLLECTION OF NEW HAMPSHIRE 



ROCKS. 



This is a catalogue of a series of specimens which have been gathered by the geolog- 

 ical survey, with the idea in view of representing in a limited collection the typical rocks 

 of the state. Prof. Hitchcock has placed such a series at the state house, at Dartmouth 

 college, the normal school at Plymouth, and elsewhere. The special collection, which 

 has furnished the material for the studies detailed in this book, has embraced the rocks 

 mentioned in this catalogue, though in order to render the work more complete a large 

 number of additional specimens, collected by the writer and others, has been consid- 

 ered. This collection at present is preserved in the Peabody museum of Yale college ; 

 and for this collection alone the v.'riter is responsible. The references are to the pages 

 where the specimens have been particularly described. 



1. Diabase, East Hanover, p. 150. 



2. Diabase, Mt. Washington river, p. 151. 



3. Diabase (loose). Rye, p. 152. 



4. Diabase, Bartiett. 



5. Mica diabase, Flume, Lincoln, p. 153. 



6. Mica diabase, Wakefield (not Dixville), p. 153. 



7. Mica diabase, Waterville. 



8. Labradorite porphyry, Ossipee, p. 154. 



9. Anorthite diabase, East Hanover, p. 155. 



10. Anorthite diabase, Concord, Vt. 



11. Olivine diabase, Campton falls, p. 157. 



12. Diorite (porphyritic), Campton falls, p. 161. 



13. Diorite (porphyritic), Campton falls, p. 162. 



14. Diorite (porphyritic), North Lisbon, p. 162. 



15. Diorite (porphyritic). Profile house, Franconia, p. 16^. 



16. Diorite (porphyritic), Dixville notch, p. 164. 



