ILLUSTRATIONS XIU 



ILLUSTRATIONS 



Plates 



Page 



Plate 1 — Day : Portrait of George F. Becker 14 



2 — Mendenhall : Portrait of G. K. Gilbert 26 



3— Upham : Portrait of C. H. Hitchcocli 64 



4 — Kemp : Portrait of A. A. Julien 81 



" 5 — Kindle : Portrait of L. M. Lambe 88 



6— Kemp : Portrait of G. S. Rogers 97 



" 7— Leith : Portrait of C. R. Van Hise 100 



" g — Willis : Curves of absolute strength of rock from the surface 



to 100 miles below it, at surface temperature 300 



" I) '• Diagram of compression and thermal expansion of rock 



between the surface and a depth of 40 miles 300 



"10 •■ Illustration of deformation of a solid in the zone of 



flowage, solid flow being accompanied by shearing . . 301 



11 '• Positive and negative elements of North America 301 



12 " Bathymetric map of the Atlantic Ocean 302 



" 13 " Horizontal stresses and stress differences between 



lighter and heavier columns 302 



" 14 — Daly: Sketch map presenting data bearing on oscillations of 



levels 305 



Figures 

 Chad WICK : 



Figure 1 — Diagram showing actual vertical, but seemingly horizontal, 



displacement of gently sloping strata 117 



** 2 — Map and section of Clarendon-Linden fault area in west- 

 ern New York 119 



Wiixis: 



Figure 1 — Longitudinal section through steel cylinder with wall 0.33 



centimeter and inclosing one of the rock columns 254 



" 2 — Diagram showing the column of rock with a vertical and 

 transverse hole drilled through it, inclosed in a heavy 

 tube of nickel steel 257 



Coleman : 



Figure 1 — Eastern edge of the Labrador ice-sheet 320 



" 2 — Map of Gasp6 in the Ice Age .322 



" 3 — Section across Gasp6 in the Ice Age 323 



(14 plates; 7 figures.) 



