APPENDIX. 755 



The petroleum of the island of Trinidad arises from the Tertiary formation. 



Mineral oil is a compound of hydrogen and carbon. The composition varies 

 between C^H^ and C^H^. In becoming inspissated it is often more or less 

 oxydized, losing sometimes in part its fusibility and its solubility in ethei. 



See further, on this subject, a paper by E. B. Andrews in the Amer. Jour. Sci. 

 [2] xxxii. 85, and one by T. S. Hunt in the Canadian Naturalist and Geologist, 

 vi. 241, August, 1861, from which the larger part of the above facts have been 

 cited. 



H. — Catalogue of American Localities of Fossils. 



The following catalogue of American localities of fossils contains only some 

 of the more important, and is intended for the convenience especially of the stu- 

 dent-collector. 



Localities of Fossils. 



Potsdam sandstone. — Swanton, Vt. ; Braintree, Mass. ; Keeseville (at " High 

 Bridge"), Alexandria, N.Y. ; Chiques Ridge, Pa. ; Falls of St. Croix, Osceola 

 Mills, Trempaleau, "Wisconsin; Lansing, Iowa; St. Ann's, Isle Perrot, C.W. ; near 

 Beauharnois on Lake St. Louis, C.E. 



Calci/erous. — Point Levi, Mingan Islands, Philipsburg, and near Beauharnois, 

 C.E. ; Grand Trunk Railway between Brockville and Prescott, St. Ann's, Isle 

 Perrot, C.W. ; Amsterdam, Fort Plain, Canajoharie, Chazy, Lafargeville, Ogdens- 

 burgh, N.Y. 



Chazy limestone. — Chazy, Galway, Westport, N.Y. ; Island of Montreal, C.E., 

 1 to 3 miles north of " the Mountain." 



Bird's-eye limestone. — Amsterdam, Little Falls, Fort Plain, Adams, Water- 

 town, N.Y. 



Black River limestone. — Watertown, N.Y. ; Ottawa, C.W. ; Island of Mon- 

 treal, and near Quebec, C.E. 



Trenton limestone. — Adams, Watertown, Boonville, Turin, Jacksonburgh, Little 

 Falls, Lowville, Middleville, Fort Plain, Trenton Falls, N.Y. ; Pine Grove, Aarons- 

 burg, Potter's Fort, Milligan's Cove, Pa. ; Highgate Springs, Vt. ; Montmorency 

 Falls and Beauport Quarries near Quebec, Island of Montreal (quarries N. of 

 the city), C.E.; Ottawa, Belleville, Trenton (G. T. R. R., W. of Kingston), C.W. ; 

 Copper Bay, Mich. ; Elkader Mills, Turkey River, Dubuque, Iowa ; Falls of St. 

 Anthony, St. Paul, Mineral Point, Cassville, Beloit, Quimby's Mills near Benton, 

 Wis.; Warren, Illinois. 



Uiica slate. — Turin, Martinsburgh, Lorraine, Worth, Utica, Cold Spring, 

 Oxtungo and Osquago Creeks near Fort Plain, Mohawk, Rouse's Point, N.Y.; 

 Rideau River along R. R. at Ottawa, bed of river two miles above, C.W. 



Hudson River group. — Pulaski, Rome, Lorraine, and Boonville, N.Y. ; Penn's 

 Valley, Milligan's Cove, Pa. ; Oxford, Cincinnati, 0. ; Madison, Ind. ; Anticosti, 

 opposite Three Rivers, C.E. ; Weston on the Humber River, nine miles W. of 

 Toronto, C.W. ; Little Makoqueta River, Iowa; Savannah, Green Bay, Wis.; 

 Scales Mound, 111. ; Drummond's Island, Mich. 



jredina sandstone. — Lockport, Lewiston, Medina, Rochester, N.Y. ; Long Nar- 

 rows below Lewistown, Pa. 



