The American Geologist. 
December, 1905. 
Age and origin of gold deposits of 
the isthmus of Panama, O. H. 
Hershey, xxiv, 73. 
Agnostus levigatus Wallerius (rev.) 
xvii, 49. 
Agno.-tus. N. American species of, 
A. W. Vogdes, ix, 377. 
Aguilera, J. G., Fauna fosil de la 
Sierra de Catorce San Luis Po- 
tosi (rev.) xvi, 313; (and Ordon- 
yez), Expedicion Cientifica al 
Popocatapetl. (abs.), .xvii, 330; 
Geological Survey of Mexico 
(rev.), xx, 1S4; Discovery of the 
Bacubirito meteorite, xxxiii, 267. 
Aid to the investigator and general 
student, An important. (ed. 
com.), xix, 209. 
Akron, Ohio, Subterranean com- 
motion. E. W. Claypole, i, 190. 
Alabama, Eocene (Am. Com.), ii, 
270; Tertiary and Cretaceous 
(rev.), iv, 1SS; "Warrior coal field; 
Frazer, vii, 305; Geol. Sur., (p. 
s.n.), vii, 269; Northeastern, 
Hayes (rev.) x, 322; Beryl (p. 
s.n.), x, 39S; Coosa valley; C. W. 
Hayes (abs.) xiii, 142; Geological 
map, (rev.), rv, 5S; Geol. sur., 
coastal plain (rev.), xv, 266; 
Coosa coal field, Gibson Crev.^, 
xvi, 260; iron making, W. B. 
Phillips (rev.) xxili, 32S; New me- 
teoric iron (rev.), xxiv, 319; Geol. 
Sur., Warrior coal basin, McCal- 
ley (rev.), xxvl, 61; Index to 
mineral resources, McCalley (rev.) 
xxxiv, 195. 
Alabama Indust. and Sci. Soc. (p. 
s.n.), vii, 71. 
Alaska Glaciers, W. P. Blake and 
G. F. Wright (cit.) Iv, 63; Mi- 
croscopic character of the ore of 
the Treadwell mine, Adams, Iv. 
88: Mt. St. Elias. Russell and 
Yukon valley, Hayes, (abs.), Iv, 
216; Ice under tundra. Russell 
(p. s.n.), vi 325; Ice cliffs on the 
Kowak river, Cantwell, vi, 51; 
Explorations In, Anon, vll, 33; 
Muir glacier, H. P. Cushing, viii, 
207; Ditto, G. F. Wright, viii. / 
330; Pribyloff islands, S. Brown 
(rev.) ix, 217; Alaska, John Muir, 
xi, 2S7; Physical geography of, 
Russell (rev.) xiv, 331; Geology 
of Glacier bay, Cushing (abs.), 
xvii, 61; Ditto (rev.), xvii, 331; 
Hypersthene-Andesite from Mt. 
Edgecombe, Cushing, xx, 156; 
Explorations (p,s,n,), xxi, 265; 
Reconnoissance of gold fields, G. 
K Becker (rev), xxi, 382; Sur- 
face geology, O. Nordenskjold, 
xxlii, 2SS; Crossing the Valdez 
glacier at Bates pass, W. R. 
Abercrombie, xxiv, 349; Work of 
the U. S. Geol. Sur. (p. s.n.), xxvl, 
64; Scapolite rocks, J. E. Spurr 
(rev.) xxvi, 393; Granite of the 
Yukon valley, R. G. McConnell, 
xxx, 55: Extinct bison (p.s.n.) 
xxxi. 262; Harriman Expedition, 
Glaciers and glaciation. G. K. 
Gilbert frev.), xxxiii, 259: Dit- 
to, Geology and paleontology, 
Emerson, Palache, Dall, Ulrich, 
Knowlton (rev.), xxxiv, 122; Coal 
fields (p. s.n.) xxxiv, 401; R.econ- 
noissance in northern, Scnrader, 
(rev.) xxxv, 247. 
Albertite-like asphalt in the Choc- 
taw nation (rev.) xxiv, 319. 
Alden, W. C. (with R. D. Salis- 
bury), Geography of Chicago and 
its environs (rev.), xxv, 174; Chi- 
cago, folio, U. S. G. S.. xxxi, 255. 
Alderson, V. C. Geology in the High 
School, iv, 2S4. 
Algae, Considerations on, G. Mail- 
lard (rev.) ii, 54; From the Tren- 
ton limestone, R. P. Whitfield, 
(rev.), xv, 183;. As geological 
guides, xiii, 95. 
Algerie, Le bassin de la Tafna. L. 
Gentil, (rev.), xxx, 253. 
Algonquin and Nipissing beaches, 
F. B. Taylor, xvii, 397; and War- 
ren beaches. Upham, xvii, 400. 
Algonquin river. G. K. Gilbert 
(abs.), xviii, 231. 
Alkali deposits of Wyoming, T. T. 
Read, xxiv, 164. 
Alkaline rocks of Madagascar, A. 
Lacroix (rev.), xxxi, 163. 
Alkaline reaction of some natural 
silicates. F. W. Clarke, (rev.), 
xxiii, 328. 
Allamakee county, Report on. S. 
Calvin, (rev.), xvii, 51. 
Allanite and Epidote, intergrowths 
of, W. H. Hobbs, xii, 218. 
Allegany county, Maryland, Abbe 
and O'Harra (rev.), xxix, 119. 
Allen. Thos. W., (p. s.n.), xxvii, 327. 
Allotropic forms of silver. Lea 
(cit.), iv. 254. 
Alluvial river terraces, develop- 
ment of (rev.), R. E. Dodge, xlv, 
397. 
Altitudes between lake Simerior 
and the Rocky mountains, Upham 
(rev.) ix, 341; Dictionary of, in 
the United States. Gannett (rev.) 
xxv, 121. 
Aluminum, produced by electroly- 
sis (p.s.n.) Ml, 344; Market prices 
(p. s.n.) vii, 272. electro-metal- 
lurgical process (p.s.n.) x, 398. 
Alunogen and bauxite in New 
Mexico (abs.) W. P. Blake, xiv, 
196. 
Amboy clay series, Age of, A. Hol- 
lick (abs.), xxii, 255. 
America, How long ago peopled, 
(ed. com.), xxxi, 312. 
American Anthropological associa- 
tion (p.s.n.), xxxvi, 64. 
American Anthropologist (p.s.n.), 
I, 133; (rev.), iii, 149. 
American Aphidae, Tertiary. Scud- 
der (rev.), xv, 123. 
American Association for the ad- 
vancement of Science (ed. com.), 
ii, 118; (p.s.n.), ii, 138, 359; (p. 
s.n.), iv. 64. 251, 256; (p.s.n.), vi, 
261; (p.s.n.), viii, 62, 192; Pleisto- 
cene papers at, viii, 230; (p.s.n.), 
xii, 130; Pleistocene papers at, 
xii, 172; (p.s.n.), xii, 207; Lists 
and abstracts of papers, xiv. 202; 
(p.s.n.), xv, 195; (p.s.n.), xvi. 68; 
Geol. Soc. and Am. Asso., War- 
ren Upham, xvi, 233; (p.s.n.). 
xviii, 59; Warren Uphm, xviii, 
