Contents. v 
Personal and ScienlHic Xews. — American Association for the Advance 
ment of Science, Toronto meeting, 251. — The Geological Societ' 
of America, 253. — The Iowa Academy of Sciences, 253. — Miscella 
neons News, 254. 
NOVEMBER NUMBER. 
Charles Whittlesey. [Portrait.] Alexander Winchell. |25' 
Mathematical theories of the- earth. R. S. Woodward. 26J 
Geology in the high school. Victor Clifton Alderson. J , 28' 
The photographic survey of a state. Moritz Fischer. . 28! 
On a possible chemical origin of the iron ores of the " 
Keewatin in Minnesota. N. H. Winchell andH. V. 
WiNCHELL 29 
Review of recent geological literature. —'!^o\&r heat, gravitation and sun 
spots, J. H. Kedzie, 300. — Structures et classification des rochet 
eruptives, A. Michel Levy, 303. — On some salient points in th 
geology of Queensland. Robert L. Jack, 307. — The mineralog 
of Pennsylvania, Part i, John Eyerman, 309. — Salt; its discover 
and manufacture in Kansas, Robert Hay, 309. — On the pre 
duction of secondary minerals at shear-zones in the crystallm 
rocks of the Malvern Hills, Charles Callaway, 310. 
Recent Publications , 310. 
Correspondence. — Some interesting Norwegian geology, A. Wincheli 
314. 
Personal and Scientific News, 320. 
DECEMBER NUMBER. 
George H. Cook. [Portrait.] John C. Smock 32 
The Cincinnati rocks : W^hat has been their physical 
history? [Illustrated.] Nelson W. Perry 32 
Paleozoic Ostracoda from Pennsylvania, U.S. [Illus- 
trated.] Prof. T. Rupert Jones 33 
Methods of stratigraphy in studving the Huronian. 
N. H. Winchell \ 34 
Jura, Neocomian and Chalk of Arkansas. Jules Mar- 
cou 35 
Fence wall geology. Aug. F. Foerste 36 
Editorial (Jominent. — Some recent speculations on the origin of petr 
leum, 371. 
Review of recent geological literature. — Address to the Geological Sectic 
of the Briti-sh Association, James Geikie, 376.— Solar heat, Gra- 
itation and Sun-spots, J. H. Kedzie. 379. 
Recent Publications, Z?,\. 
Correspondence. — On the chemical origin of the Vermilion lake in 
ores, C. R. Van Hise, .382, N. H. Winchell andH. V. Winchel 
383. — Gilsonite or Uintaite, E. W. Claypole, 3S7. — The geolo' 
of the Montmorenci, Joseph F. James, 387. 
Personal and Scientific Xeics. — The Nami)a image, 387. — The Kans 
Academy of Science, annual meeting, 388. — The irrigation proble 
in Dakota, Prof. Culver, 389.— Report of the committee on tl 
International Congress of Geologists, 390. — Western Society 
Naturalists, 391.— Extinct mammals of California, Bowers, 391.- 
The Peace and Athabasca region, McConnell, 392.— Missou 
Geological Survev, 392.— Artesian water from the Archean, 392. 
Index, 393. 
