GENERAL INDEX TO THE REPORTS. 
Page, 
Adirondack river, ...... „ . 301 
Allanite, 109 
Allegany, 401 
Alluviums, 214, 225, 386, 459 
Avon Spa, 74 
Barometrical observations, 238 
Bird's eye limestone, , 370 
Black slate or shale, „ 371, 381, 431 
Bog iron ore, „ 224, 386, 463 
Boulders, 464 
Catalogue of plants, „ 117 
Catalogue of animals, 7 
Calciferous sandrock of Eaton,. 52, 324, 369 
Carburetted hydrogen, _ 57, 449, 465 
Caradoc sandstone, 201 
Catskill mountain group, 212, 227 
Cacoxene, 110 
Carburet of iron, 361 
Cashaqua shale, 390,423,430 
Carr's, E. S. asst's report from the 3d dist. 385 
Cattaraugus county, 412 
Chaw^ed rock, 419, 427 
Chemung group, 381, 402 
Clays, 294, 386, 460 
Communication from L. C. Beck, 37 
Corniferous limerock of Prof. Eaton, 378 
Coarse grained black ore, 290 
Coal, 410, 415, 430 
Conglomerate, 409, 414, 466 
Delthyris shaly limestone 377 
Drab limestone, 417, 426 
[Assembly No. 50.] 61 
