FOR    THE    YEARS    1901-1905,   INCLUSIVE.  297 
Schaller  (Waldemar  T.) — Continued. 
2.  Spodumene  from  San  Diego  Co.,  California. 
Cal.  Univ.,  Dept.  Geol.,  Bull.,  vol.  3,  pp.  265-275,  3  pis.,  1903. 
Describes  occurrence,  crystallization,  physical  properties,  and  composition. 
3.  Notes  on  some  California  minerals. 
Am.  Jour.  Sci.,  4th  ser.,  vol.  17,  pp.  191-194,  1904. 
Describes  the  character,  occurrence,  and  composition  of  halloysite,  amblygonite,  boothite, 
pisanite,  and  a  quartz  pseudomorph. 
4.  The  tourmaline  localities  of  southern  California. 
Science,  new  ser.,  vol.  19,  pp.  266-268,  1904. 
Describes  the  occurrence  and  character  of  tourmaline  deposits. 
5.  Dumortierite. 
Am.  Jour.  Sci.,  4th  ser.,  vol.  19,  pp.  211-224,  3  rigs.,  1905. 
Describes  the  general  and  crystallographic  characters,  and  composition  of  this  mineral. 
6.  Crystallography  of  lepidolite. 
Am.  Jour.  Sci.,  4th  ser.,  vol.  19,  pp.  225-226,  1905. 
7.  Dumortierite. 
U.  S.  Geol.  Surv.,  Bull.  no.  262,  pp.  91-120,  3  figs.,  1905. 
8.  Mineralogical  notes. 
U.  S.  Geol.  Surv.,  Bull.  no.  262,  pp.  121-144,  4  figs..  1905. 
Describes  the  occurrence,  composition,  and  optical  and  other  properties  of  various  minerals. 
Schaller  (W.  T.)  and  Hillebrand  (W.  F.). 
1.  Crystallographical  and  chemical  notes  on  lawsonite. 
Am.  Jour.  Sci.,  4th  ser.,  vol.  17,  pp.  195-197,  1904. 
2.  Notes  on  lawsonite. 
U.  S.  Geol.  Surv.,  Bull.  no.  262,  pp.  58-60,  1  fig.,  1905. 
Describes  the  optical  characters  and  chemical  composition. 
Schaller  (W.  T.),  Graton  (L.  C.)  and. 
1.   Purpurite,  a  new  mineral. 
See  Graton  (L.  C.)  and  Schaller  (W.  TV),  1. 
Scherer  (George  H.). 
1.  Geology  of  the  Hahatonka  district,  Camden  County  [Missouri]. 
Drury  Coll.,  Bradley  Geol.  Field  Station,  Bull.,  vol.  1,  pp.  58-67,  1  pi.,  1905. 
Gives  an  account  of -the  occurrence  and  geologic  formations  of  the  region  and  of  the  springs. 
Schiotz  (O.  E.). 
1.  Results  of  the  pendulum  observations  and  some  remarks  on  the  constitution  of 
the  earth's  crust. 
Nansen's  Norwegian  North  Polar  expedition.    Scientific  results,  vol.  2,  viii,  pp.  1-90,  1901. 
Schmeckebier  (Laurence  F. ). 
1.  Catalogue  and  index  of  the  publications  of  the  Hayden,  King,  Powell,  and 
Wheeler  surveys,  namely:  Geological  and  Geographical  Survey  of  the  Terri- 
tories, Geological  Exploration  of  the  Fortieth  Parallel,  Geographical  and  Geo- 
logical Surveys  of  the  Roc>y  Mountain  region,  Geographical  and  Geological 
Surveys  west  of  the  One  Hundredth  Meridian. 
U.  S.  Geol.  Surv.,  Bull.  no.  222,  208  pp.,  1904. 
Schmidt  (C). 
1.   Ueber  vulkanische  Asche,  gefallen  in  San" Cristobal  L.  C.  (Siid-Mexiko)  am  25 
Oktober  1902. 
Centralbl.  f.  Min.,  p.  131,  1C03. 
Discusses  the  composition  of  volcanic  ashes. 
Schmitt  (Joseph). 
1.  Monographic  de  Pile  d'Anticosti  (golfe  Saint-Laurent), 
Paris,  A.  Hermann,  1904.     vi,  367  pp.,  12  figs,  and  map. 
