300 INDEX TO NORTH AMERICAN GEOLOGY, PALEONTOLOGY, [bull. 189. 
Pennsylvania— Continued. 
White clays Of southeastern Pennsylvania, 
Hopkins, 2757. 
Yardley fault, Pennsylvania, Lyman, 3611. 
Petrology. 
(it in red. 
A needed term in petrography, Pirsson, 4395. 
Accessories of rocks, separation of heavy, 
Derby, 1484. 
^Egirite granite from Mi ask, Ural Mountains, 
Pirsson, -1409. 
Building and ornamental stones, Buckley, 655. 
Building materialsof Pennsylvania, Hopkins, 
2741. 
Building stones of New England, Beals, 329. 
B'ysmaliths, Iddings, 2840. 
Chemical and mineral relationships in igne- 
ous rocks, Iddings, 2838. 
Chemical and optical properties of amphi- 
• boles, Lane, 3385. 
Classification of igneous rocks, Hobbs, 2651. 
Classification of igneous rocks, Spurr, 5185. 
Classification of igneous rocks, Turner, 5476. 
Classification of rocks, Lewinson-Lessing, 3509. 
Complementary rocks and radial dikes, Pirs- 
son, 4389. 
Composition of kulaite, Washington, 5881. 
Consanguinity of eruptive rocks, Derby, 1485. 
Determination of feldspars, Winchell, 6339. 
Determination of plagioclase feldspars, Beck- 
er, 348. 
Differentiation in igneous magmas, Teall, 
5361. 
Differentiation of magmas, Winchell, 6343. 
Dike rocks, Bascom, 285. 
Distribution of ancient volcanic rocks, Wil- 
liams, G. H., 6164. 
Educational series of rock specimens, Diller, 
1507. 
Fisher meteorite, Winchell, 6321. 
Formation of pegmatite veins, Brogger, 613. 
Fractional crystallization of rocks, Becker, 
343. 
Genesis of claystones, Nichols, 4094. 
Genetic relationships among igneous rocks, 
Iddings, 2828. 
Geological history of Panama and Costa Rica, 
Hill, 2557. 
Granites of Rhode Island, Kemp, 3014. 
Granitic rocks and crystalline schists, origin 
of, Hall, C. W., 2242. 
Granodiorite and other intermediate rocks, 
Lindgren,3549. 
High wood Mountains of Montana, Johnston- 
Lavis, 2923. 
Hornblende with augite, intergrowth of, 
Hobbs, 2631. 
Igneous rock series, Harker, 2292. 
Igneous rocks, classification of, Bayley, 304. 
Igneous rocks from Panama and Costa Rica, 
Wolff, <>U2. 
Igneous rocks, origin of, Iddings, 2826. 
Lecture notes on rocks, Kemp, 2993. 
Magmatic alteration of hornblende and bio- 
tite, Washington, 5870. 
Magmatic differentiation, BiickstrOm, 141. 
Magmatic differentiation in rocks of copper- 
bearing series, Lane, 3391. 
Petrology— Continued. 
General — Continued. 
Methods of determining character of mineral 
plates, Wadsworth, 5771. 
Monazite district of North and South Caro- 
lina, Mezger, 3978. 
Monazite districts of North and South Caro- 
lina, Raymond, 4560. 
Nomenclature of feldspathic granolites, Tur- 
ner, 5491. 
Nomenclature of metamorphic lavas, Turner, 
5468. 
Oldest known rock, Winchell, 6347. 
Origin of Archean greenstones, Winchell, N. 
H., 6317. 
Origin of novaculites, Branner, 546. 
Origin of Paleotrochis, Diller, 1510. 
Origin of pegmatite, Crosby and Fuller, 1164. 
Origin of phenocrysts, Crosby, 1178a. 
Petrographical notes, Kemp, 2971a. 
Phenocrysts of intrusive igneous rocks, Pirs- 
son, 4405. 
Plea for popular exposition of lithology, 
Gratacap, 2158. 
Poikilitic and miero-poikilitic structure, Wil- 
liams, G. H., 6158. 
Porphyry, Rickard, 4596. 
Review of papers on granitic intrusions, 
Adams, 19. 
Review of queries on rock differentiation, 
Tolman, 5438. 
Rock classification, Iddings, 2837. 
Rock differentiation, Becker, 341. 
Rocks from United States-Mexico boundary, 
Lord, 3572. 
Rocks of Laurentian system, A.dams, 24. 
Rocks of the Laurentian, Adams, 23. 
Separation of alumina and formation of co- 
rundum, Pratt, 4446. 
Statement of rock analyses, Washington, 5882. 
Study of natural palimpsests, Grimsley, 2191. 
Succession and relation of lavas in the Great 
Basin region, Spurr, St 83. 
Summary of progress, Bayley, 315. 
Summary of progress in mineralogy and pe- 
trography, Bayley, 311. 
Use of term plutonic plugs, Iddings, 2850. 
Use of term plutonic plugs, Russell, 4718. 
Variation in composition of igneous rocks, 
Walker, 5826. 
Volcanite, Hobbs, 2638. 
Zirkelite, Wadsworth, 5772. 
Alabama. 
Metamorphic rocks from Alabama, Brooks, 
615. 
Metamorphic rocks of Alabama, Smith, 5012. 
Rocks from Alabama, Clements, 1014. 
Alaska. 
Geology of Glacier Bay, Alaska, dishing, 1241. 
Geology of Yukon gold district, Spurr, 5173. 
Gold fields of southern Alaska, Becker, 345. 
Noteson hypersthene-andesite, Gushing, 1243. 
Notes on some eruptive rocks, Williams, G. H., 
6154. 
Reconnoissance along the Chandlar and 
Koyukuk rivers, Schrader, 4834. 
Reconnoissance from Pyramid Harbor to 
Eagle City, Brooks, 623. 
