756 INDEX TO VOLUME XXVI 
Gregory, Herbert E. Geology of the Navajo Country. A Recon- 
» naissance of Parts of Arizona, New Mexico, and Utah. Review 
by S. W. W. 
Grout, Frank F. A Form of Multiple Roce Diderae 
Internal Structures of Igneous Rocks; Their Sieniseanee and 
Origin; with Special Reference to the Duluth Gabbro 
Two-Phase Convection in Igneous Magmas 
A Type ot Igneous Differentiation 
Hart Mountain Overthrust and Associated Structures in Park County, 
Wyoming, The. By C. L. Dake . 
Hinds, Henry, and F. C. Greene. Geologic Atlas of the United State: 
Leavenworth-Smithville Folio, Kansas-Missouri. Review by 
Frank Leverett 
Honduras, Central America, Notes on a m@ollecion of Rods ome By 
Wilbur G. Foye 
Hotchkiss, W. O., assisted b E. F. Bead il O. Ww. Wheelumene 
Minneral Land Classification in Part of Northwestern Wisconsin. 
Review by H. R. B. 
Hudson Bay Region, Correlation of dhe Early Ginnie Teal in hs 
By T. E. Savage : SRA aR Gi ee 
Icebergs, Transportation of Débris by. By O. D. von Engeln 
Iddings, J. P. Review of Chemical Analyses of Igneous Rocks. By 
Henry Stephens Washington 
Igneous Differentiation, A Type of. By ite rp. Grout 
Igneous Rocks, Internal Structures of; Their Significance and Origin; 
with Special Reference to the Duluth Gabbro. By Frank F. 
Grout , : , é : : 
Illinois State Geological Saver Veurhoor ex ITO. Review by H.R. B. 
Iron-Formation on Belcher Islands, Hudson Bay, with Special Refer- 
ence to Its Origin and Its Associated Algal Limestones, ‘The. 
By E. S. Moore Sar tance REET IRS Wiens ht ea ge 
Tron Ores at Kiruna, Origin of ie. By Reginald A. Daly. Review 
by ERS Brie eee 0 58 CESS a PAID A gare uN Ota ee 
Johannsen, Albert. Petrological Abstracts and Reviews 
PAGE 
622 
439 
O21 80;22 7.2533 77 Tae 
Johnson, B. L., S. R. Capps and. The Ellamar District, Alaska. 
Review by H Be 
Johnson, Douelns Wilson. Block peclaie in the Kelana Lakes 
Region 
Jones, William F. A Geological Recommaicenee: in ani A Conte 
bution to Antillean Geology . : : Saat 
Journal of the W eae PO ae of Seiences v, 1915. Review by 
H.R. B. Roa 
Kay, F. H., and K. D. White. ‘Coal Resources of District VIII Cos 
ville), Illinois. ‘Review by H. R. B. ‘ 
94 
229 
728 
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