INDEX TO VOL. XXIII. 
Adularia and other secondary miuernls 
of the cupper-boaring rocks, ^ N. H. 
Wiuchell, ;^17. 
Am. Mus. Nat. Hist., 395. 
Ancient glacial action in .\ustralasia, 
C. H. Hitchcock. 252. 
Arkansas Geol. Survey, 394. 
.-Vugite-syeuite near Loon lake. New 
York, H. P. Cushing, 106; XiU. 
Hagg. R. -M., .Jr., Cretaceous foraminif- 
era in .Now Jersey, 126. 
Hain, H. F., .\utes on the Drift of 
Northwestern Iowa, 168; 205. 
Barrois, C, Des relations des Mers Devo- 
nieniiesde Bretagne et des .Ardennes. 
'M>6 ; Li'Kxrension du Silurien Superieur 
(hms le Fas de Calais. ;>6; Les Goiiia- 
tites du ravin de Conlarie, 386. 
Bascom, F.. On some dikes iu the vicin- 
ity of .Johns Hay, Maine, 275. 
Reitvag zur keuntniss des Mittelcambri- 
nin von Jenes iu lirthmen, J. V. Zel- 
izko, 61. 
Bell, Robert, Outline of tlie geology of 
Hudson bay and strait. 92. 
Hlake, W. f ., Distribution of metallic 
wealth in .\rizoua, 125. 
Bowiiocker, J. .v., Pr.'glacial channel in 
Ohio and Indiana, 17s. 
Branner, J. C, 394. 
Brrjwn, W. H., 99. 
Campbell. M. R., The Richmond folio, 
195. 
Causes of variation in the composition 
of igneous rocKs, T. L. Walker, 327. 
Characters of crystals, an introduction 
to phy.sical crystallography, A. J. Mo- 
ses, 389. 
(Mdorastrolite and zonochloritc from 
Isle Koyale, N. H. Winchell, 116. 
('lark, W. B., Maryland geological sur- 
vey, 193. 
Clarke, F. W., .-Mkaline reaction of some 
natural silicates, 328. 
Clarke, John M., 67. 
Coleman, A. P., TIk- Iroquois beach at 
Toronto and its fossils, 103. 
Coilett, John, 338. 
Common zeolites of tlie Miimesota shore 
of lake Superior. .N. H. Winchell, li6. 
Cope. Edward Drinkei-, Hiden 1). King, 1. 
Cordilleran geological club, 273. 
Correspondence. 
Dr. Hoveys report on the meeting ■^>f 
the Geological Society, 266. 
The duplication of geologic formation 
names, F. B. Weeks, 266. 
The truth about tiie Nampa figurine, 
(t. F. Wright, 267. 
Collecting fossils in the Cincinnati 
shales, 335. 
"The truth about the Nampa figurine," 
W J McGee, 336. 
Cretaceous foraminifera of New Jersey, 
K. M. Hagg, Jr., 126. 
Crosby, W. O.. Glacial lake of the Nas- 
hua valley, 102. 
Cushing, H. P., The boundary of the 
Potsdam north of the .Adirondacks, 
330 ; Augite-syenite neai Loon lake, 
New York, 106. :M). 
Daly, R. A., 206. 
Dart on, N. H., Discovery of fossil fish in 
the Jurassic of the Black Hills. 93: 
Mesozoic stratigraphy in St>uth western 
Black hills, 93; Relations of Tertiary 
formations xn the Western Nebraska 
region, 94; Shore line of Tertiary lakes 
on the slopes of the Black hills, 94 ; :127. 
Davis, A. W., 67. 
Davis, W. M., Physical Geography, 127; 
The Peneplain, 207. 
Davison, J. .M., l^latiuumand Iridium in 
Meteoric Iron, 327. 
Dawson, G. M., .V remarkable land slip 
on the Riviere Hlanche, 103; Geol. Sur- 
vey Can., Ann. Summary report, 384. 
Des relations des Mers Devoniennes de 
Bretagne et des Ardennes, C. Barrois, 
:386. 
Diller, J. S., The educational series of 
rock specimens collected and distribu- 
ted by the United States Geological 
Survey, 61. 
Differences in batholitic granites accord- 
ing tc) depth of erosion, B. K. Emerson, 
105. 
DiftVrenciation of Magmas, Lewinson- 
Lessuig, :i46. 
Discovery of fossil fish in the Jurassic of 
the Black Hills, N. H. Darton, 93. 
Distribution of metallic wealth in Ari- 
zona. W. P. Blake, 125. 
Drift of Northwestern Iowa, H. F. Bain, 
168. 
Eakle. A. S., T..paz crystals in the U. S. 
Nat. Museum, 125. 
Earth Sculpture, or the origin of land 
forms, James Geikie, 261. 
