788  INDEX    TO    PUBLICATIONS    OF    U.    S.   GEOL.   SURVEY,      [bull.  177. 
Titanite,  composition  of Bull  150,  pp  43-44 
in  rocks  of  Pacific  slope Mon  xm,  p  85 
occurrence  and  statistics  of MR  1883-84,  p  774 ; 
MR  1891,  p  551;  MR  1892,  pp  780-781;  Ann  16,  iv,  p  605 
(See,  also,  Sphene.) 
Titanium,  separation  of,  in  rock  analyses Bull  78,  pp  87-90 
warning  against  use  of  fluoriferous  hydrogen  peroxide  in  estimating.  .Bull  167,  p  56 
Titanium  and  aluminum,  separation  of,  and  of  titanium  and  iron.. Bull  27,  pp  16-26 
Titanotherium  bed Bull  84,  p  336 
Tobacco,  cultivation  of,  in  Porto  Rico WS  32,  pp  36-37 
Toccoa  River,  Georgia,  flow  of,  measurements  of Ann  21, 
iv,  pp  166-167;  WS  27,  pp  60,  64,  65,  66;  WS  36,  pp  171-172 
Todd  (J.  E.),  geology  and  water  resources  of  a  portion  of  southeastern  South 
Dakota WS  34 
moraines  of  Missouri  Coteau  and  their  attendant  deposits Bull  144 
moraines  of  southeastern  South  Dakota  and  their  attendant  deposits Bull  158 
Togiak  gravels  of  Alaska,  notes  on Ann  20,  vn,  p  177 
Togiak  River,  Alaska,  geologic  notes  taken  along Ann  20,  vn,  pp  139-140 
itinerary  of  a  reconnaissance  along Ann  20,  vu,  pp  56-57,  87-89,  99 
Tohickon  Creek,  flow  of,  measurements  of Ann  20, 
iv,  pp  48,  98-103;  Ann  21,  iv,  pp  83-85;  WS  35,  p  64 
Tombigbee,  Tuscaloosa,  and  Alabama  rivers,  Tertiary  and  Cretaceous  strata 
of Bull  43 
Tok  sandstone  of  Alaska,  notes  on Ann  20,  vu,  p  473;  Ann  21,  n,  pp  362,  370 
Tokanon  River,  Washington,  description  of WS  4,  pp  23-24 
Tombigbee  sand  of  Mississippi Bull  82,  pp  105-107,  1 14,  219 
Tonalite,  analysis  of,  from  Massachusetts,  South  Leverett Mon  xxix,  p  336; 
Bull  148,  p  74;  Bull  168,  p  30 
of  Massachusetts,  western Mon  xxix,  pp  331-342 
Tonalite  group  of  igneous  rocks,  definition  of  and  descriptions  of  species  from 
Alaska Ann  20,  vu,  pp  189,  204-206 
Tonalite-aplite,  analysis  of,  from  Alaska,  Yukon  River Bull  168,  p  229 
Tongrian  formation,  correlation  of Ann  18,  n,  p  341 
Tongue  River,  irrigation  along Ann  13,  in,  pp  70-71 
Tonsina  River,  Alaska  trails  along Ann  21,  n,  pp  415-416 
Tonto group,  or  series,  of  Grand  Canyon  of  the  Colorado.  .Bull  81,  pp  220-221, 356-357 
origin  of  name Bull  81 ,  p  245 
Tonto  sandstone  of  Grand  Canyon  district Bull  86,  pp  330,  331,  passim 
Topaz,  an  unusual  occurrence  of Bull  20,  pp  81-82 
analysis  of,  from  Colorado,  Pikes  Peak  region Bull  20,  p  71 
from  Japan,  Omi Ann  21,  vi  cont,  p  459 
from  Maine,  Stoneham Bull  27,  p  9,  10 
chemical  constitution  of Bull  125,  pp  16,  19,  101 
composition  of Bull  150,  p  38 
from  Maine,  Stoneham Bull  27,  pp  9-15 
in  Colorado,  Florissant  and  Devils  Head  Mountain Bull  20,  pp  70,  74 
in  nevadite  from  Colorado,  Chalk  Mountain Mon  xn,  p  347 
in  rhyolite Bull  20,  p  81 
occurrence  and  statistics  of MR  1882,  p  486;  MR 
1883-84,  pp  737-738,  781 ;  MR  1885,  p  443;  MR  1886,  pp  596, 
604;  MR  1887,  pp  556,  557;  MR  1888,  pp  580-581,  584,  585; 
MR  1889-90,  pp  446,  447,  448;  MR  1891,  p  539;  MR  1892, 
pp  764-765,  781;  Ann  16,  iv,  pp  604,  605;  Ann  17,  in  cont, 
p  923;  Ann  18,  v  cont,  pp  1203,  1217;  Ann  19,  vi  cont,  p 
513;  Ann  20,  vi  cont,  pp  585-586,  599;  Ann  21,  vi  cont,  p  461 
