FOR    THE    YEAKS    1901-1905,  INCLUSIVE. 
743 
Petrology— Continued. 
Rocks  described — Continued. 
Serpentine,  Newland,  1. 
Serpentine,  Peck,   1. 
Serpentine,  Pratt  and  Lewis,  1. 
Serpentine,  Smith  and  Calkins,  1. 
Serpentine,  Spencer  (A.  C),  10. 
Shale,  Wright  (P.  E.),  6. 
Shale,  Van  Hise,  12. 
Shonkinite,  Barrell,  1. 
Shonkinite,  Osann,  2. 
Shonkinite,  Pirsson,  1,  3,  4. 
Shonkinite,  Weed  and  Pirsson,  1. 
Shonkinose,  Pirsson,  4. 
Shoshonose,  Pirsson,  4. 
Slate,  Eckel,  27. 
Slate,  Sears,  1. 
Slate,  Van  Hise,  12. 
Slate,  Weidman,  5. 
Soda-granite-porphyry,  Clarke  and  Stei- 
ger,    1. 
Soda-rhyolite,  Smith  and  Calkins,   1. 
Soda-syenite,  Smith  and  Calkins,  1. 
Sodalite-syenite,  Pirsson,  4. 
Solvsbergite,    Sears,    1. 
Spherulite,  Parkinson,  1. 
Steatite,  Pratt  and  Lewis,  1. 
Syenite,  Barlow,  4. 
Syenite,   Barrell,    1. 
Syenite,  Coleman,  13. 
Syenite,  Cushing,  10. 
Syenite,  Daly,  7. 
Syenite,  Kay,  1. 
Syenite,  Ogilvie,  6. 
Syenite,   Osann,   1. 
Syenite,  Parks,  1. 
Syenite,  Peck,  1. 
Sytnite,  Phalen,   1. 
Syenite,  Pirsson,   1,  4. 
Syenite,   Sears,   1. 
Syenite,  Weed  and  Pirsson,  1. 
Syenite,  Wright  (P.  E.),  3,  6. 
Syenite-porphyry,  Cross  and  Spencer,  1. 
Syenite-porphyry,   Pirsson,  4. 
Syenite-porphyry,  Smith   (W.  S.  T.),  5, 
6. 
Syenite-porphyry,  Wright   (F.  E.),  6. 
Syenite  var.  pulaskite,   Pirsson,  4. 
Syenyte  dike,  Barber,  1. 
Syenyte-monzonyte,    Barber,    1. 
Syenyte  porphyry,  Barber,  1. 
Tephrite,  Stevens   (E.  A.),  2. 
Thaumasite,  Penfield  and  Pratt,  1. 
Theralite,  Dresser,  9. 
Tinguaite,  Finlay   (G.  I.),  4,  8. 
Tinguaite,  Kemp,  32. 
Tinguaite,  Osann,  1. 
Trachiphyro-monzonose,  Pirsson,  4. 
Tonalite,  Spurr,  3. 
Tonalite-porphyry,    Spurr,   3. 
Trachiphyro-highwoodose,   Pirsson,   4. 
Trachiphyro  -   hornblende  -  adamellose, 
Pirsson,  4. 
Trachiphyro-monzonose,   Pirsson,  4. 
Tracho-highwoodose,   Pirsson,   4. 
Trachyandesite,    Pirsson,   4. 
Trachydolerite,  Jaggar  and  Palache,  1. 
Petrology— Continued. 
Rocks   described — Continued. 
Trachyte,  Breed,  1. 
Trachyte,   Cress    (W.),   6. 
Trachyte,  Dresser,  9. 
Trachyte,  Emerson   (B.  K.),  6. 
Trachyte-porphyry,  Pirsson,  4. 
Trap,  Lane,  22. 
Tremoiite,  Peck,  1. 
Troctolite,  Pratt  and  Lewis    1. 
Tuff,  Barlow,  6. 
Turquoise,  Johnson   (D.  W.),  6. 
Umptekite  gabbro,  Sears,  1. 
Unakite,  Phalen,  2. 
Uralite-diabase,  Palache,  3. 
Uralite-porphyry,  Emerson  (B.  K.),  6. 
Variolite,  Daly,  9. 
Vogesite,  Finlay  (G.  I.),  8. 
Vogesyte,  Barber,  1. 
Volcanic  ash,  Klein,  1. 
Volcanic  dust,  Bonney,  5. 
Volcanic  dust,  Porter  (F.  B.),  1. 
Websterite,  Pratt  and  Lewis,  1. 
Windsorite,  Daly,  7. 
Wyomingite,  Ciark  and  Steiger,   1. 
Philippine  Islands. 
Coal  deposits  of  Batan  Island,  Smith 
(W.   D.),   1. 
Coal  deposits  of  Polillo  Island,  Wig- 
more,   1. 
"^al  deposits  on  the  Batan  military 
reservation,  Wigmore,  2. 
Coal  Measures  of  the  Philippine  Is- 
lands, Burritt,  1. 
Crystallization  of  luzonite,  Moses,  5. 
Geological  reconnaissance  of  Bulacan, 
McCaskey,  1. 
Geology  of  the  Philippine  Islands, 
Becker,   1. 
Pigholugan  and  Pigtao  gold  regions, 
Island  of  Mindanao,  Nichols  (J.  C. ), 
1. 
Sixth  annual  report  of  the  Mining 
Bureau,  McCaskey,  2. 
Volcanoes   and   seismic   centers   of   the 
Philippine   Archipelago,    Maso,    1. 
Physiographic  geology. 
Alaska. 
Alaska  glacers  and  glaciation,  Gilbert, 
13. 
Geography  of  Alaska,  Brooks.  10. 
Geography   of  Alaska,   Gannett,   2. 
Geological  section  of  Rocky  Mountains 
in  northern  Alaska,  Schrader,  1. 
Geology  and  mineral  resources  of  Cop- 
per River  district,  Schrader  and 
Spencer,  1. 
Geology  of  Copper  River  region,  Men- 
denhall,  8. 
Physiography  of  the  Copper  River 
basin,  Spencer  (A.  C. ),  2. 
Reconnaissance  in  Norton  Bay  region, 
Mendenhall,  1. 
Reconnaissance  of  the  Cape  Nome  and 
adjacent  gold  fields  of  Seward  Pen- 
insula, Brooks  and  others,  1. 
Wrangell  Mountains,  Mendenhall,  5. 
