FOE   THE    YEARS    1901-1905,   INCLUSIVE.  161 
Henderson  (Junius) — Continued. 
2.  The  Arapahoe  glacier  in  1903. 
Jour.  Geol.,  vol.  12,  pp.  30-33,  1  fig.,  1904. 
Compares  the  status  of  the  Arapahoe  glacier  of  Colorado  in  1903  with  that  of  1902. 
3.  Paleontology  of  the  Boulder  area  [Colorado] . 
Colo.  Univ.,  Studies,  vol.  2,  pp.  95-107,  1904. 
Gives  lists,  with  notes  on  their  occurrence  and  character,  of  fossils  found  in  formations  of 
Cretaceous  age  in  the  Boulder,  Colorado,  area. 
4.  Extinct  glaciers  of  Colorado. 
Colo.  Univ.,  Studies,  vol.  3,  pp.  39-44,  1905. 
Discusses  the  occurrence  of  evidences  of  former  glaciation  in  Colorado. 
5.  Arapahoe  glacier  in  1905. 
Jour.  Geol.,  vol.  13,  p.  556,  1905. 
Henretta  (CM.). 
1.  Bankhead  coal  mines  [Alberta,  Canada]. 
Can.  Mg.  Inst.,  Jour.,  vol.8,  pp.  215-220,  1  pi.,  1905. 
Includes  notes  on  the  occurrence  and  character  of  the  coal  seams. 
Henrich  (Carl). 
1.  The  Guanajuato  mining  district  [Mexico]. 
Mg.  Mag.,  vol.  10,  pp.  23-30,  101-108,  15  figs.,  1904. 
Describes  the  occurrence,  geologic  relations,  and  mining  of  the  silver  ores  of  this  region. 
Henry  (Carl  D.). 
1.  The  white  country  granite  of  West  Sugar  Loaf  or  Bald  Mountain,  Boulder  County, 
Colorado. 
Colo.  Sci.  Soc,  Proc,  vol.  7,  pp.  112-116,  1903. 
Describes  the  occurrence,  the  megascopic  and  microscopic  characters,  and  the  composition  of 
this  rock. 
Herrick  (Clarence  Luther). 
1.  Applications  of  geology  to  economic  problems  in  New  Mexico. 
Int.  Mg.  Cong.,  4th  session,  Proc,  pp.  61-64,  1901. 
Describes  some  of  the  geologic  features  and  the  occurrence  of  economic  minerals. 
2.  Secondary  enrichment  of  mineral  veins  in  regions  of  small  erosion. 
Mg.  &  Sci.  Press,  vol.  87,  p.  97,  1903. 
3.  A  Coal-Measure  forest  near  Socorro,  New  Mexico. 
Jour.  Geol.,  vol.  12,  pp.  237-251,  10  figs.,  1904. 
Describes  the  general  geologic  structure  of  the  Rio  Grand  Valley  and  the  occurrence,  charac- 
ter, and  fauna  of  Coal-Measure  strata  in  vicinity  of  Socorro,  New  Mexico. 
4.  Laws  of  formation  of  New  Mexico  mountain  ranges. 
Am.  Geol.,  vol.  33,  pp.  301-312,  393,  2  pis.,  1904. 
Describes  the  geologic  structure  and  physiographic  features  of  various  mountain  ranges  of 
New  Mexico. 
5.  The  clinoplains  of  the  Rio  Grande. 
Am.  Geol.,  vol.  33,  pp.  376-381,  1  fig.,  1904. 
Describes  the  character,  occurrence,  and  origin  of  clinoplains  in  the  vicinity  of  Socorro,  New 
Mexico. 
6.  Lake  Otero,  an  ancient  salt  lake  basin  in  southeastern  New  Mexico. 
Am.  Geol.,  vol.  34,  pp.  174-189,  1  pi.,  3  figs.,  1904. 
Describes  the  geologic  structure  and  history,  physiographic  features,  and  economic  resources 
of  the  region,  the  character  and  relations  of  the  formations  present,  and  the  extent  and 
history  of  the  ancient  lake  Otero. 
Herrick  (H.  N.). 
1.  Gypsum  deposits  in  New  Mexico. 
U.  S.  Geol.  Surv.,  Bull.  no.  223,  pp.  89-99,  1  pi.,  9  figs.,  1904. 
Describes  character,  occurrence,  and  geologic  relations  of  the  gypsum  deposits  of  New  Mexico. 
Bull.  301—06 11 
