134  BIBLIOGRAPHY    OF    NORTH    AMERICAN    GEOLOGY 
Gay  (WareB. ). 
1.    [In  discussion  of  paper  on  "The  Richmond  coal-basin,  Virginia,"  by  J.  B.  Wood- 
worth.] 
Am.  Inst.  Mg.  Engrs.  •Trans.,  vol.  31,  pp.  1011-1012,  1902. 
Geikie  (Archibald). 
1.  The  founders  of  geology. 
Johns  Hopkins  Univ.,  George  Huntington  Williams  Memorial  lectures,  vol.  1,  297  pp.,  1901. 
Abstract:  Am.  Jour.  Sci.,  4th  ser.,  vol.  11,  p.  326,  1901. 
Gidley  (J.  W.). 
1.  Tooth  characters  and  revision  of  the  North  American  species  of  the  genus  Equus. 
Am.  Mus.  Nat,  Hist.,  Bull.,  vol.  14,  pp.  91-142,  4  pis.,  27  figs.,  1901. 
2.  A  new  three-toed  horse. 
Am.  Mus.  Nat.  Hist.,  Bull.,  vol.  19,  pp.  465-476,  1903. 
3.  On  two  species  of  Platygonus  from  the  Pliocene  of  Texas. 
Am.  Mus.  Nat.  Hist.,  Bull.,  vol.  19,  pp.  477-481,  5  rigs.,  1903. 
4.  The  fresh-water  Tertiary  of  northwestern  Texas.     American  Museum  expeditions 
of  1899-1901. 
Am.  Mus.  Nat.  Hist,,  Bull.,  vol.  19,  pp.  617-635,  7  pis.,  4  figs.,  1903. 
Describes  explorations  in  the  Tertiary  beds  of  northwestern  Texas,  and  the  character,  occur- 
rence, and  fossil  contents  of  Pleistocene,  Pliocene,  and  Miocene  formations. 
5.  Proper  generic  names  of  Miocene  horses. 
Am.  Mus.  Nat,  Hist.,  Bull.,  vol.  20,  pp.  191-194,  1904. 
Gidley  (J.  W.),  Matthew  (W.  D. )  and. 
1.  New  or  little-known  mammals  from  the  Miocene  of  South  Dakota.     American 
Museum  expedition  of  1903. 
See  Matthew  (W.  D.)  and  Gidley  (J.  W.),  1. 
Gilbert  (Grove  Karl). 
1.  Physical  history  of  Niagara  River  [New  York]. 
U.  S.  Geol.  Surv.,  Map  of  Niagara  River  and  vicinity,  1901.    Abstract:  Am.  Geol.,  vol.  27, 
pp.  375-377,  1901. 
2.  On  some  joint  veins. 
Abstract:  Science,  new  ser.,  vol.  15,  pp.  84-85,  1902. 
3.  John  Wesley  Powell. 
Science,  new  ser.,  vol.  16,  pp.  561-567,  por.,  1902. 
A  sketcn  of  his  life  and  work. 
4.  John  Wesley  Powell:  a  memorial  to  an  American  explorer  and  scholar.     Com- 
prising articles  by  Mrs.  M.  D.   Lincoln  (Bessie  Beach),  Grove  Karl  Gilbert, 
Marcus  Baker,  and  Paul  Cams.     Edited  by  Grove  Karl  Gilbert.     (Reprinted 
from  "The  Open  Court.") 
Chicago,  The  Open  Court  Publishing  Company,  75  pp.,  4  pis.  (por.),  1903. 
5.  Powell  as  a  geologist. 
Wash.  Acad.  Sci.,  Proc,  vol.  5,  pp.  113-118,  1903. 
6.  Proposed  investigation  of  subterranean  temperatures  and  gradients. 
Carnegie  Inst.  Wash.,  Yearbook  no.  1,  1902,  pp.  285-286,  1903. 
Presents  a  proposition  for  a  deep  boring,  and  states  results  to  be  obtained  thereby. 
7.  John  Wesley  Powell. 
Smith.  Inst.,  Ann.  Kept,  for  1902,  pp.  633-640,  por.,  1903. 
Revised  by  the  author  from  article  published  in  Science,  October  10,  1902.    See  no.  3  above. 
8.  Joint  veins. 
Abstract:  Geol.  Soc.  Am.,  Bull.,  vol.  13,  pp.  521-522,  1903. 
Contains  brief  note  on  joint  structures  in  the  House  range,  Utah. 
9.  A  highly  viscous  eruption  of  rhyolite. 
Abstract:  Science,  new  ser.,  vol.  17,  p.  221,  1903. 
