X 
CONTENTS. 
Page. 
Franklin county (continued). 
Malone ore,. 331 
Potsdam sandstone,. 331 
Calciferous sandrock,. 332 
Drift and surface materials,. 333 
Soil and superficial deposits,.. 334 
St. Lawrence county, . 335 
Geological divisions,. 336 
Hypersthene and granite,. 337 
Primary limestone,. 340 
Gneiss and hornblende,. 340 
Iron ores,. 341 
Magnetic ores,. 347 
Bog iron ore,. 348 
Renssclaerite,. 350 
Steatite or soapstone,. 352 
Galena and lead,. 354 
Coal-hill mine,. 355 
Victoria and other lead mines,. 358 
Potsdam sandstone,. 360 
Calciferous sandrock,. 361 
Superficial covering, drift and boulders, 364 
Simple minerals,. 365 
Recapitulation,. 366 
Jefferson county,. 368 
Rivers, valleys and surface,. 368 
Primary rocks,. 373 
Rensselaerite,. 375 
Iron ores, . 376 
Potsdam sandstone, .. 377 
Calciferous sandrock,. 380 
Page. 
Jefferson county (continued). 
Birdseye limestone,. 382 
Isle la Motte marble,. 386 
Trenton limestone,. 387 
Utica slate, . .. 397 
Loraine shales, ••. 401 
Grey sandstone, . 406 
Extension of the New-York system 
in Canada,. 407 
Gulfs of Loraine and Rodman,.408 
Distribution of drift and boulders, etc. 410 
Recapitulation,. 413 
Hamilton county, . 414 
Mountains, surface, lakes,. 414 
Primary and sedimentary rocks, .... 416 
CHAPTER XI. 
Some of the common substances which may 
be employed for economical purposes,. 418 
Economical materials existing in the form 
of rocks,.. 418 
Economical materials in the form of simple 
minerals,. 420 
CHAPTER XII. 
On drift; grooves and scorings of rocks; 
hypotheses; depression or submergence, 
and gradual rise; glacial theory, etc... 422 
Tabular view of the sedimentary rocks of 
the Second district,. 429 
List OF engravings, . . 431 
