FOR    THE    YEARS    1901-1905,   INCLUSIVE.  315 
Spencer  (Arthur  Coe)—  Continued. 
8.  Manganese  deposits  of  Santiago,  Cuba. 
U.  S.  Geol.  Surv.,  Bull.  no.  213,  pp.  251-255,  1903. 
Describes  briefly  the  geologic  structure  of  the  region  and  the  occurrence  and  probable  output 
of  manganese  ores. 
9.  The  Juneau  gold  belt,  Alaska. 
U.  S.  Geol.  Surv.,  Bull.  no.  225,  pp.  28-42,  1904. 
Describes  the  general  geology  and  the  occurrence  and  mining  of  gold. 
10.  The  copper  deposits  of  the  Encampment  district,  Wyoming. 
U.  S.  Geol.  Surv.,  Professional  Paper  no.  25,  107  pp.,  2pls.  (maps);  49  rigs..  1904. 
Describes  the  general  geology  and  the  character  and  occurrence  of  Mesozoic,  Tertiary,  pre- 
Cambrian,  and  igneous  rocks,  and  copper  and  silver  ore  deposits,  and  discusses  the  origin 
of  the  copper-ore  bodies. 
11.  The  geology  of  the  Treadwell  ore  deposits,  Douglas  Island,  Alaska. 
Am.  Inst,  Mg.  Engrs.,  Trans.,  vol.  35,  pp.  473-510,  12  figs.,  1905.     Mg.  &  Sci.  Press,  vol.  89,  pp. 
240-241,  259-260,  274,  292-293,  310,  325-326,  344,  1904.     Abstract:  Mg.  Rep.,  vol.  50,  pp.  616-617, 
1904. 
Describes  the  general  geology,  the  occurrence,  character,  and  relations  of  intrusive,  igneous, 
and  sedimentary  rocks,  and  the  occurrence,  geologic  relations,  character,  and  origin  of  the 
gold  ore  deposits. 
12.  Genesis  of  the  magnetite  deposits  in  Sussex  Co.,  New  Jersey. 
Mg.  Mag.,  vol.  10,  pp.  377-381,  4  figs.,  1904. 
13.  Pre-Cambrian  rocks  of  the  Franklin  Furnace  quadrangle  [New  Jersey]. 
Abstract:  Science,  new  ser.,  vol.  21,  p.  391,  1905. 
14.  The  Treadwell  ore  deposits,  Douglas  Island. 
U.  S.  Geol.  Surv.,  Bull.  no.  259,  pp.  69-87,  4  rigs.,  1905. 
Describes  the  general  geology,  the  character,  and  occurrence  of  the  gold-ore  deposits,  and 
surrounding  rocks. 
15.  Progress  of  work  in  the  pre-Cambrian  rocks  [of  New  Jersey]. 
N.  J.  Geol.  Surv.,  Ann.  Rept.  for  1904,  pp.  247-252,  1905. 
16.  What  is  a  fissure  vein? 
Econ.  Geol.,  vol.  1,  pp.  289-294,  1905. 
17.  The  magmatic  origin  of  vein-forming  waters  in  southeastern  Alaska. 
Am.  Inst.  Mg.  Engrs.,  Bi-Mo.  Bull.,  no.  5,  pp.  971-978,  1905. 
18.  The  origin  of  vein-filled  openings  in  southeastern  Alaska. 
Am.  Inst.  Mg.  Engrs.,  Bi-Mo.  Bull.,  no.  6,  pp.  1211-1216,  3  figs.,  1905. 
Spencer  (Arthur  Coe),  Hayes  (C.  Willard),  Vaug-han  (T.  Way  land),  and. 
1 .  Report  on  a  geological  reconnaissance  of  Cuba. 
See  Hayes  (C.  W.),  Vaughan  (T.  W.),  and  Spencer  (A.  C),  1. 
Spencer  (Arthur  Coe),  Schrader  (Frank  C. )  and. 
1.  The  geology  and  mineral  resources  of  a  portion  of  the  Copper  River  district, 
Alaska. 
See  Schrader  (F.  C.)  and  Spencer  (A.  C),  1. 
Spencer  (Joseph  William  Winthrop). 
1.  On  the  geological  and  physical  development  of  Antigua. 
London  Geol.  Soc,  Quart.  Jour.,  vol.  57,  pp.  490-505,  and  map,  1901. 
2.  On  the  geological  and  physical  development  of  Guadelupe. 
London  Geol.  Soc,  Quart.  Jour.,  vol.  57,  pp.  506-519, 1901. 
3.  On  the  geological  and  physical  development  of  Anguilla,  St.  Martin,  St.  Bartholo- 
mew, and  Sombrero. 
London  Geol.  Soc,  Quart.  Jour.,  vol.  57,  pp.  520-533,  1901. 
4.  On  the  geological  and  physical  development  of  the  St.  Christopher  chain  and 
Saba  Banks. 
London  Geol.  Soc,  Quart.  Jour.,  vol.  57,  pp.  534-544, 1901, 
