8 CONTENTS. 



Pabi. 



Oayiigalake, 239 



Ontario lake, 240 



Oneida lake, 241 



Onondaga lake, 241 



Lake Sodom, 242 



Scratches and furrows upon water-worn rocks, 244 



Mounds, &c 247 



CHAPTER X. 



Brief account of the Rocks, &c. in the order of their superposition, beginning with the lowest rock 

 in each of the thirteen counties, and the half of Tompkins county, which compose the third 

 district: 



1. M(mt^mery, including Fulton county, 249 



2. Olsego county, 253 



3. Herkimer county, 255 



4. Oneida county, -. 259 



5. Lewis county, 264 



6. Oswego county, 270 



7. Madison county, 271 



8. Onondaga county, 277 



9. Cayuga county, 285 



10. Cortland county, 289 



11. Chenango county, 292 



12. Broome county, 294 



13. Tioga county, 296 



14. Tompkins county, the east hal^ 298 



CHAPTER XI. 



Explanation of the Map ; with some observations, etc. upon those parts of the two lower sections of 



the Map, which pass through the district, 300 



CHAPTER Xn. 



Of the rocks collected for the State and for the Colleges, 304 



Closing finally with a wood-cut of the Hamilton agelacrinite, (described at page 158,) 306 



