WEEKS. 
PETROLOGY, AND MINERALOGY FOR 1892-1900. 
305 
Petrology— Continued. 
New York — Continued. 
Geological section of East River, New York, 
Kemp, 2988. 
Geology of Adirondack region, Smyth, 5094. 
Geology of Essex County, Kemp, 3003. 
Geology of Lake Placid region, Kemp, 3005. 
Geology of Orange County, Ries, 4622. 
Geology of Washington, Warren, Essex, and 
Hamilton counties, 30j7a. 
Gneisses of Gouverneur, Smyth, C. H., 5076. 
Granite at Mounts Adam and Eve, Kemp and 
Hollick, 2977. 
Granite-diorite near Harrison, N. Y., Ries, 
4615. 
Intrusion in Inwood limestone, Eckel, 1612. 
Magnetite area near Port Henry, Kemp, 3004. 
Metamorphism of gabbro, Smyth, 5084. 
Monoclinic pyroxenes of New York, Ries, 
4617. 
Moriah and Westport townships, Essex 
County, N. Y., Kemp, 2987. 
Newark rucks, Kftmmel, 3283. 
Newark system, Kiimmel, 3282. 
Newly discovered dike at De Witt, N. Y., 
Darton and Kemp. 1310. 
Origin of serpentines, Merrill, 3937. 
Peridotite in New York, Smyth, C. H., 5072. 
Pre-Cambrian and Post-Ordovician trap dikes 
in the Adirondacks, Cushing, 1242. 
Rensselaer gril plateau, Dale, 1251. 
Syenite-porphyrj dikes, Cushing, i_ii. 
Trap dikes of Lake Champlain region, Kemp 
and Marsters, 2978. 
Weathering in alnoite, Smyth, 5091. 
North t 'arolina. 
Corundum and basic magnesian rocks, Lew is, 
3508. 
origin of corundum, Pratt, 4440. 
Ohio. 
Limestones, microscopical study of, Grimsley, 
2184. 
l're-Tcrtiary nepheline-bearing rock, Basci »m, 
277. 
Oregon. 
Bohemia mining region of western Oregon, 
Diller, L513. 
Etoseburg folio, Diller, L508. 
Pennsylvania. 
Aporhyolite of South Mountain, Bascom, 279. 
Birdsboro trap quarries, Rand. 1527. 
Feldspars in serpentine, Hopkins. 2744. 
Gabbro, occurrence of, Kemp, 2976. 
Igneous rocks of York Haven, Ehrenfeld, 
1619. 
Perido-steatite and diabase, Bascom, 278. 
Piedmontite and scheelite rocks, Williams, 
G. H., 6157. 
Serpentines of eastern Pennsylvania, Rand, 
4526. 
Trap dikes in Chester County, Pa., Rand, 4525. 
Volcanic rocks of Mesozoic age, Goldsmith, 
2045. 
Volcanic rocks of South Mountain, acid, Bas- 
com, 275. 
Volcanic rocks of South Mountain, Pennsyl- 
vania, Bascom, 276. 
Bull. 189—02 20 
Petrology— Continued. 
Pennsylvania— Continued. 
Volcanic rocks of South Mountain, Williams, 
G. H., 6155. 
Rhode Islam I. 
An orbicular granite from Rhode Island, 
Kemp, 2983. 
Conanicut Island, geology of, Pirsson, 4384. 
Geology of Conanicut Island, Rhode Island, 
Collie, 1053. 
South Dakota. 
Black Hills, Scott, 1864. 
Diabase, new occurrence of olivine, Culver 
and Hobbs, 1212. 
Igneous intrusions in the Black Hills, Russell, 
4705. 
Phonolite rocks from the Black Hills, Pirsson, 
4386. 
Sioux quartzite, Beyer, 433. 
Tellurium in gold ores, Smith, 5020. 
Texas. 
Igneous rocks from vicinity of San Carlos and 
Chispa, Tex., Lord, 3573. 
Melilite-nepheline basalt and nepheline 
basanite, Osann, 1175. 
Texas meteorites, Cummins, L225. 
Trans Pecos Texas, rocks of. Osann, 4176. 
Uvalde folio Texas, Vaughan, 5739. 
Volcanic dusl in Texas, Turner, 5461. 
Utah. 
Geology of Tintie district, Tower and Smith, 
5445. 
Igneous phenomena in Tintie Mountains, 
Smith, 5028. 
Tintie special folio, Smith, 5032. 
Vermont. 
Basaltic how Iders from Vermont, Hovey, 2765. 
Camptonite dikes mar Danbyboro, \'t., Mars 
ters, 3726. 
Ottrelite-bearing phase of metamorphic cm 
glomerate, Whittle. 0119. 
Virginia. 
Felsophyre and basalt in Paleozoic rocks, 
Darton and Keith, L327. 
Geology of Richmond Basin, Shaler and 
Wood worth, 1939. 
Harpers Ferry folio, Keith, 2958. 
Weathering of diabase, Watson, 5889. 
Weathering of micaceous gneiss, Merrill, 3960. 
Washington. 
Geology of the Cascade Mountains, Russell, 
1721. 
Rocks of Mount Rainier, Smith, 5027. 
Tacoma folio, Willis and Smith, 6216. 
Tertiary granite in the northern Cascades, 
Smith and Mendenhall, 5035. 
Wisconsin. 
Basic massive rocks of Lake Superior region, 
Bayley, 308. 
Geology of St. Croix Dalles, Berkey, 427, 128. 
Iron-bearing series, Irving and Van Hise, 2869. 
Mineral alterations in the granitic rocks of 
the Northwestern States, Hall, 2448. 
Notes on a geological excursion, Hall, C. W., 
2245. 
Pre-Cambrian igneous rocks, W T eidman, 5970. 
Quartz keratophyre from the Baraboo Bluffs, 
Wisconsin, Weidman, 5969, 
