Index. 
studies in the Indiana natural gas field, 
Leverett, 6. 
Stur, D.,Die lunzer Flora in "The Meso- 
zoic coal field of eastern Virginia " 115. 
Su^generic groups of Naticopsis, Keyes, 
193. 
Sudbury, Ont. , excursion to, 256. 
Swank, James M., Production of iron in 
the United States in 1888, 63. 
Taconic in the Salt range of Punjab, 
Marcou, 60: in S. E. New Foundland, 
121. 
Terminal moraine near Louisville, Bry- 
son, 125. 
Tertiary and Cretaceous strata of Ala- 
bama, Smith and Johnson, 188. 
Thompson's theory of convection cur- 
rents, as cause for solar heat, 185. 
Tjpton-run coal, age of, I. C. White, 25. 
Todd, Prof. J. E., 255. 
Torrell, Prof. Otto 50. 
Treadwell mine, Alaska, notes on, Daw- 
son 84; microscopical character of the 
ore of, Adams, 88 
Trematis, new species, Ulrich, 21. 
Triassic formation of the Connecticut 
valley, Davis, 112. 
Tuomey. Prof. , 189. 
Tyrrell, J. B., 63. 
u 
Ulrich, E. O., New fossils, 21. 
University of Texas, school of geolo gy 
320. 
Upham, Warren, Theory for terrestrial 
glaciation, 108: Beaches of lake Agas- 
siz, 128; glaciation of mountains, 165, 
205. 
Van Hise, Prof. C. R., Chemical origin of 
iron ores of Minnesota, 291, 382. 
Veriieuil, M. Edward, 2. 
Views on prenebular conditions, A. Win- 
chell, 196. 
w 
Waagen, Dr. A., On the boulder or Obolus 
beds, 60. 
Wachsmuth, and Springer, 64. 
Wadsworth, Dr. M. E., 294. 
Walcott, C. D., 50; position of the Olenel- 
lus fauna, 62: 123; 139. 
Western Society of Naturalists, 391. 
White, I. C, Age of the Tipton-run coal, 
Whitfield, Prof. R. P., 108. 
Whittlesey, Col. Charles. Sketch of life 
and work, A. Winchell, 257. 
Winchell, Alexander, Views on preneb- 
ular conditions, 196; sketch of Doug- 
lass Houtihton, 129; sketch of Col.Chas. 
Whittlesey, 257; 297; interesting Nor- 
wegian geology, 314 
Winchell, N. H., Methods of stratigraphy 
in studying the Huronian, 342. 
Winchell, N. H. (and H. V.), Chemical 
origin of Keewatin iron ores 291, 383. 
Winslow, Prof. Arthur, 253, 392. 
Woodward, R S., Mathematical theories 
of the earth, 268. 
Woolsey, Theodore Dwight, 127. 
Worth, Dr. , Discovers the primor- 
dial in the Salt range of India, 61. 
Worthen, Prof. A. H., f-3. 
Wright, G. Frederick, 64; Ice-age in 
North America, 106; Nampa image, 387. 
Yates, Dr. Lorenzo G., 64. 
EKRATA. 
p. 223, three lines from bottom, for "west of Pecos" read castt of Pfcos. 
p. 233, eight lines from bottom of page, instead of "before" read ofter; instead 
of "S E." read N. IC. 
p. 94, vol. III. The date of publication of the article of Emmons was 1841 in- 
stead 1847. 
i 
