Co?i tents. V 
Ancient Glacial Action in Australasia. C. H. Hitch- 
cock 252 
Editorial Comment. — Causes of Glaciation, 257. 
Revieio of Recent Geological Literature.— The Glacial origin of the 
Dvvyka conglomerate. Dr. G. A. F. Molengraaf, 259. — Earth 
Sculpture, or the origin of land forms, James Geikie, 261. — Rive;s 
of North America, Israel C. Russell, 261. — Studies on Cambrian 
Faunas No. 2, G. F. Matthew, 262. 
Monthly Aut/iors' Catalogue of American Geological Literature, 26.3. 
Gorresponrhuce . — Dr. Hovey's report on the late meeting of the Geo- 
logical Society, E. O. Hovey, 266. — The duplication of Geologic 
Formation names, F. B. Weeks, 266. — The truth about the Nampa 
Figurine, G. F. Wright, 267. 
Personal and Scientific News, 272. 
MAY NUMBER. 
On f^ome Dikes in the vicinity of Ji)hns Bay, Maine. 
F. Bascom. [Plate? VIII, IX, X, XI.] 275 
A plea for the popular exposition of Lithology for Mu- 
seum purposes. L. P. Gratacap 281 
Prelirainarj" notes on the surface geology of the Yukon 
territoiy. Otto Noudenskjold 288 
The Missourian Series of the Carboniferous. C. R. 
Keyes 298 
Adularia and other secondary minerals of the copper- 
bearing rocks. N. PI. WiNCHELL 317 
Modified drift and the Champlain Epoch. Warren 
Upham 119 
Revieiv of Recent Geological Literature. — Mineralogical Notes: analyses 
of tysonite; bastnasite, prosopite, jeffersonite, covellite, etc., W. F. 
Hillebrand, 324. — On the chemical composition of tourmaline, S. 
L. Penfield, .325. — Notes on North Carolina minerals, J. H. PKAin', 
325. — The origin and chemical composition of petroleum, a Symposi- 
um, Sadtler, Peckham, Day. Phillips, Mabery, .326.— Genesis of 
bitumens as related to chemical Geology, S. F. Peckham, 327. — 
Dikes of felsophyre and basalt in Paleozoic rocks in central Appala- 
chian Virginia, N. H. Darton, 327.— Platinum and Iridium in me- 
teoric iron, John M. Davison, 327.— Cau.ses of variation in igneous 
rocks, T. L. Walker, .327.— On the associated minerals of Rhodo 
lite, W. E. Hidden and J. H. Pratt, 328.— The Alkaline Reaction 
of some natural silicates, F. W. Clarke, .328. — Petroleum inclu- 
sions in quartz crystals, Chas. L. Reese, 328. — Mineral resources of 
