413 
PSOE xX. LO" V Oli xe 
A 
Acervularia davidsoni and A. profunda, 
note on their differences, 5. Calvin, 355. 
Adams, F. D., 218; Tabulation of igneous 
rocks, 268. 
Agnostus, Vogdes, 377. 
Archean eruptive rocks of Finnland, 49, 
Arrow-points from the Loess at Muscatine, 
Iowa, F. M. Witter, 276. 
Altitudes between lake Superior and the 
Rocky mountains, Warren Upham, 341. 
B 
Barton G. H. 412. 
Barus, C., Viscosity of solids, 342. 
Beachler, C.$8., Rocks of Niagara age in 
Indiana, 409. = 
Bear River formation, White and Stanton, 
7.) an 
Bell, Robert, Report on 
Mining district, 269. 
Bibliography of geology, Gilbert-Mar- 
gerie, 64; of fossil insects, Scudder, 266. 
Bibliography of North American verte- 
brate paleontology for 1891, Eyerman, 
249. 
Bituminous coal field of Pennsylvania, 
Ohio and West Virginia, Ll. C. White, 
852, 352. 
Blake, W. P., Gold in the Deep Creek 
limestone, 47; In different formations, 
166. 
Brown, S. B., Lower Coal Measures of 
Monongalia and Preston counties, W. 
Va., 224. 
Brown, Stanley, 217. 
Bryson, John, Englacial drift of Long 
Island, 278. ; 
Cc 
Calvin,S.,The Devonian rocks of Buchanan 
county, Iowa, A correction, 345; Note on 
the differences between Acervularia pro- 
funda and davidsoni, 355. 
Carpenter, Dr. P. Herbert, 69. 
the Sudbury 
Cary, Exploration on Grand river, Labra- 
dor, 402. 
Cause of an ice-age, Robert Ball, 261. 
Characters of some paleozoic fishes, Cope, 
263. 
Chemung and Catskill, Stevenson, 6. 
Clarke, J. M., Notes on Acidaspis, 202; On 
Terataspis grandis, 208; On Coronura 
_aspectans, 203. 
Classification of mountain ranges, Warren 
Upham, 205. 
Claypole, E. W., 217; Tin Islands of the 
Northwest, 228; 282. 
Climatic changes indicated by the glaciers 
of North America, I. CO, Russell, 322. 
Companions of Eozoon, &3. 
Cook, J. P., Experiments in fundamental 
chemistry, 56. 
Cope, E. D., New fishes from S. Dak., 57; 
Vrehistoric horses, 67. 
Correlation papers, Devonian and Car- 
boniferous, H. S. Williams, 5s. 
Cambrian, C. D. Walcott, 203. 
CORRESPONDENCE. 
Middleton and La Grange formations, J. 
M. Safford, 63. 
Are the Eozoonal limestones at St. John, 
New Brunswick, Pre-Cambrian? G. 
F. Matthew, 212; Arrow-points from 
the Loess at Muscatine, Iowa, F. M. 
Witter, 276; The Serpentines of the 
Coast ranges in California, M. E. 
Wadsworth, 277; Englacial drift of 
Long Istand, John Bryson, 278. 
oo deltas of the Mohawk, B.F. Taylor, 
B44. 
The Devonian Rocks of Buchanan coun- 
ty, lowa, 8. Calvin, 345. 
Rocke of the Niagara age in Indiana, C. 
S. Beachler, 40°. 
Prizes by the Bos. Soc. Nat. Hist., 409. 
Cragin, F. W., 218; Observations on Llama. 
remains from Colorado and Kansas, 257. 
Cretaceous covering of the Texas paleo- 
zoic, Tarr, 169. 
