[1920-1922] i 



Unionidae. — 1, Haas, F., 2 ; Prashad, 



B. ; Vredenburg, E., 5. 

 United States, agricultural geology. — 



1, Emerson, F. V. 

 , bibliography. — 0, Nickles, 



J. M., 1-3. 

 , Cretaceous. — 0, Berry, E. 



W., 10 ; Clark, W. B., 2. 

 , dust-fall. — 2, Winchell, A. 



N. 



, geography & geology in. — 



1, Mathews, E. B. 



, geological surveys. — 0, 



Merrill, G. P., 7 i Paige, S. ; 

 United States, 2 ; 1, Jillson, W. R., 

 20 ; United States, 11 ; 2, United 

 States, 2. 



• , glass- & moulding-sands. 



—0, Boswell, P. G. H., 2, 5 ; 2, 



Boswell, P. G. H., 8. 

 , gravity observations. — 2, 



Putnam, G. R. 

 , gumbotil. — 0, Kay, G. F., 



2. 



, mineral production. — 0. 



United States, 3-9 ; 1, United 

 States, 1-10 ; 2, United States, 

 3-13- 



, mineral resources. — 0, 



McCaskey, H. D. ; Phalen, W. C, 

 2 ; Ries, H. ; Schrader, F. C, 2 ; 

 Winchester, D. E., 2 ; 1, Ashley, G. 

 H., i, 2 ; Jochamowitz, A. ; 

 Rogers, [G. S., 2 ; Stone, R. W. ; 



2, Schultze. E. 



, mineralogv in. — 1, Kraus, 



E. H. 



, ore-deposits. — 0, Emmons, 



W. H. ; Simmersbach, B. ; 1, 

 Diller, J. S. ; Harder, E. C, 2 ; 

 Sampelayo, P. H. 



, Palaeogene bryozoa. — 0, 



Canu, F., 4. 



, Pennsylvanian. — 2, Moore, 



R. C, 2. 



■ , petroleum. — 0, Grabau, 



A. W., 2 ; 1, Frankforter, C. J. ; 

 Thiessen, R., 2. 



, physiography. — 1, Lobeck, 



A. K. 



, Pre-Cambrian. — 1, Steidt- 



mann, E. 



, Quaternary. — 2, Dach- 



nowski, A. P. 

 , Silurian. — 0, Grabau, A. 



W„ 9. 



, underground tempera- 

 tures. — 0, Darton, N. H., 6. 



, water. — 0, Meinzer, O. E., 



4. 



(E.).— 0, Ashley, G. H., i, 



2. 



( ), changes of level. — 



0, Brown, C. W., 2 ; Daly, R. A., 



5 ; Vaughan, T. W., 3. 

 ( ), oilfield waters. — 0, 



Mills, R. Van A., 2. 

 ( ), soils. — 0, Wherry, 



E. T., 5. 



United States (E.), Trias. — 0, Dorsey, 

 G. E. 



(N.E.), ice-caps. — 1, Daly. 



R. A. ; 2, Cook, J. H. 

 ( ), igneous invasions. 



— 1, Barrell, J. 



( ), physiography.— 0, 



Lobeck, A. K. 

 (S.).— 0, Vaughan, T. W., 



5- 



(S. -Central), salt-deposits. 



— 1, Darton, N. H., 2. 



(S.E.I, coastal plains. — 1, 



Cleland, H. F., 2. 



( ), coral-reefs. — 1, 



Vaughan, T. W. 



( ), Tertiary. — 2, Vaug- 

 han, T. W., 3. 



(W.), coal.— 0, Rogers, G. 



S., 2. 



( ),Mesozoic. — 0, Mans- 

 field, G. R., 2 ; 2, Stanton, T. W., 



2. 



( ), palaeontology. — 1, 



Merriam, J. C, 3. 

 ( ), Tertiary. — 1, Clark, 



B. L., 2, 3 ; 2, Clark, B. L. 

 . See also Alabama, Great 



Basin, &c. 

 United States National Museum. 



See Museums. 

 Unterengadin (Graub linden). — 1, 



Staub, R., 11. 

 Untersee area (L. Constance). — 2, 



Bcehndel, E. 

 Unterwalden (Switzerland). — 0, 



Christ, P. ; 1, Arbenz, P., 3. 

 Upper Austria. — 0, Geyer, G., 4 ; 



Spengler, E., 2 ; Spitz, A., 3, 5 ; 



1, Grimmer, J. ; 2, Cathrein, A. ; 

 Nowak, E., 3. 



, Mesozoic. — 0, Diener, C, 



5 ; Kittl, E., 2 ; Spengler, E., 3 ; 



2, Trauth, F. 



Upper Greensand, Bedfordshire. — 0, 



Kitchin, F. L., 2. 

 , W. England.— 2, Boswell, 



P. G. H., 9. 

 Upper Senegal & Niger (Fr. W. Afr.). 



— 0, Hubert, H., 5 ; 1, Chudeau, 



R. 



Upperud (Sweden). — 2, Sweden, 2. 

 Uppland (Sweden). — 2, Cleve-Euler, 



A. ; Osvald, H. 

 Ural Mts. — 0, Duparc, L., 4, 5 ; 



1, Krusch, P., 4 ; 2, Posnowa, M. ; 

 Simmersbach, B. 



' Uralides,' Europe (E.). — 2, Kuzniar, 

 C. 



Uralitic dolerite. See Dolerite. 

 Uralo- Permian, French Indo-China. 



— 2, Mansuy, H., 5, 11. 

 Uralsk (Siberia). — 2, Thompson, A. 



B. 



Uraninite. — 0, Tipper, G. H. 

 Uranium. — 0, Johnstone, J. H. L. ; 



2, Fleck, H. ; United States, 8, 10. 



, Colorado. — 0, Bastin, E. S. 



, Madagascar. — 2, Muguet, — . 



