vi GONTEN DS (OF, VOLE OME TV, 
Williams (review by H. F. Bain), 638; Sketch of the Geology of the 
San Francisco Peninsula, by Andrew C. Lawson (review by A. H. 
Purdue), 640. 
ABSTRACTS: University Geological Survey of Kansas, Vol. 1,645; Till fragan 
om lommaleransalder, by Gerard de Geer, 646; Om strandliniens for- 
skjutning vid vara insjoar, by Gerard de Geer, 647; The Search for the 
North Pole, by Evelyn Briggs Baldwin, 649; lowa Geological Survey, 
Vol. V, 649; Monoclinic Pyroxenes of New York State, by Heinrich 
Ries, 651; Fifteenth Annual Report of the U.S. Geological Survey, 
652; Notes Concerning a Peculiarly Marked Sedimentary Rock, by 
Dr. J. E. Talmage, 653. 
RECENT PUBLICATIONS = 2 = 3 as = 5 2 s u 
NUMBER VI. 
DRAINAGE MODIFICATIONS AND THEIR INTERPRETATION. ee OL, 
CRITERIA FOR DETERMINING STREAM MODIFICATIONS. Marcus R. 
Campbell - : ° - Ser aie = - - - - 
THE MONCHIQUITES OR ANALCITE GROUP OF IGNEOUS Rocks. L. V. 
Pirsson~ - - - - - - - - - - - - 
THE QUEEN’S RIVER MORAINE IN RHODE ISLAND. J. B. Woodworth and 
C.F. Marbut - - = : = = = - = = - 
STUDIES FOR STUDENTS: The Principles of Rock Weathering. George P. 
Merrill - = S = = - = - 2 2 - E 
EDITORIALS - z E 2 : 3 . i z as Bi 
REVIEWS: Great Valley of California, a Criticism of the Theory of Isostasy, 
by F. Leslie Ransome; British Geology, by T. Mellard Reade; Notes 
on the Gravity Determinations reported by Mr. G. R. Putnam, by 
Grove Karl Gilbert (review by Charles R. Keyes), 729; Text-Book of 
Paleontology, Vol. I, Part 1, by Karl A. von Zittel, translated and - 
edited by Charles R. Eastman (review by Charles R. Keyes), 734; Die 
Eruptivgesteine des Kristianiagebietes. II. Die Eruptionsfolge der 
triadischen Eruptivgesteine bei Predazzo in Siidtyrol, by Professor 
W. C. Brogger (review by F. L. Ransome), 738. 
Summary of Current Pre-Cambrian North American Literature, by 
C. R. Van Hise, 744. 
ABSTRACTS: Relation between Ice-Lobes south of the Driftless Area, by 
Frank R. Leverett, 757; The Production of Coal in 1894, by Edward 
W. Parker, 757; Merocrinus Salopie n. sp. and another Crinoid from 
the Middle Ordovician of West Shropshire, by F. A. Bather, 758; 
U. S. Geologic Atlas, Folio 10, Harper’s Ferry, Virginia and Mary- 
land, 758; Folio 2, Ringgold, Georgia and Tennessee, 760; Folio 4, 
Kingston, Tenn., 762; Folio 6, Chattanooga, Tenn., 764; Folio 8, 
Sewanee, Tenn., 766. 
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