FOK    THE    YEARS    1901-1905,   INCLUSIVE.  349 
Washburne  (Chester) — Continued. 
2.  The  distribution  of  placer  gold  in  Oregon. 
Oreg.  Univ.,  Bull.,  new  ser.,  vol.  1,  no.  4,  pp.  18-19,  1904. 
3.  Beach  gold  and  its  source. 
Oreg.  Univ.,  Bull.,  new  ser.,  vol.  1,  no.  4,  pp.  19-21,  1904. 
Describes  the  occurrence  of  gold  in  the  sands  of  the  coast  of  Oregon  and  discusses  its  source. 
Washington  (Henry  Stephens). 
1.  The  foyaite-ijolite  series  of  Magnet  Cove  [Arkansas];  a  chemical  study  in  differ- 
entiation.    I. 
Jour.  Geol.,  vol.  9,  pp.  607-622,  1901. 
Comprises  a  study  of  the  chemical  composition  of  several  rock  types  and  a  discussion  of  their 
relations. 
2.  The  foyaite-ijolite  series  of  Magnet  Cove  [Arkansas];  a  chemical  study  in  differ- 
entiation.    II. 
Jour.  Geol.,  vol.  9,  pp.  645-670,  3  figs.,  1901. 
Describes  the  petrographic  characters  of  the  rocks  and  compares  them  with  similar  rocks  from 
other  regions.    Discusses  differentiation  in  laccolithic  magmas. 
3.  The  rocks  of  Lake  Winnepesaukee,  New  Hampshire. 
Abstract:  Am.  Geol.,  vol.  27,  p.  44,  1901. 
Contains  brief  notes  on  the  rocks. 
4.  A  chemical  study  of  the  glaucophane  schists. 
Am.  Jour.  Sci.,  4th  ser.,  vol.  11,  pp.  35-59,  1901. 
Describes  the  microscopic  and  chemical  characters  of  these  schists  from  several  foreign 
countries  and  from  western  United  States. 
5.  Igneous  rocks  from  eastern  Siberia. 
Am.  Jour.  Sci.,  4th  ser.,  vol.  13,  pp.  175-184,  1  fig.,  1902. 
Compares  the  characters  of  some  of  these  rocks  with  similar  rocks  occurring  in  this  country. 
6.  Chemical  analyses  of  igneous  rocks  published  from  1884  to  1900,  with  a  critical 
discussion  of  the  character  and  use  of  analyses. 
U.  S.  Geol.  Surv.,  Professional  Paper  no.  14,  495  pp.,  1903. 
Discusses  character  of  chemical  analyses  of  igneous  rocks,  the  construction  and  nomenclature 
of  the  new  quantitative  classification  and  its  correlation  with  the  qualitative  system, 
and  methods  of  calculation  employed,  and  gives  tables  embracing  nearly  all  published 
analyses  of  igneous  rocks,  arranged  according  to  the  new  system. 
Note. — These  chemical    analyses    have  not    been  separately  listed  in  the  index  of    this 
bibliography. 
7.  The  calculation  of  center-points  in  the  quantitative  classification  of  igneous  rocks. 
Abstract:  Science,  new  ser.,  vol.  17,  p.  668,  1903. 
8.  The  quantitative  distribution  of  rock  magmas. 
Abstract:  Eng.  &  Mg.  Jour.,  vol.  75,  p.  153,  1903;  Geol.  Soc.  Am.,  Bull.,  vol.  14,  p.  533*1904. 
9.  The  superior  analyses  of   igneous   rocks   from   Roth's  Tabellen,    1869  to  1884, 
arranged  according  to  the  quantitative  system  of  classification. 
U.  S.  Geol.  Surv.,  Professional  Paper  no.  28,  68  pp.,  1904. 
Note. — The  analyses  in  this  paper  have  not  been  listed  in  the  index  of  this  bibliography. 
10.  Manual  of  the  chemical  analysis  of  rocks. 
New  York,  John  Wiley  &  Sons.     183  pp.,  1904. 
Describes  fully  methods  of  analysis  of  rocks. 
Washington  (Henry  S. ),  Cross  (Whitman),  Idding-s  (Joseph  P.),  Pirsson  (Louis 
V.)and. 
1.  A  quantitative  chemico-mineralogical  classification  and  nomenclature  of  igneous 
rocks. 
See  Cross  (W.)  and  others,  1. 
2.  Quantitative  classification  of  igneous  rocks. 
See  Cross  (W.)  and  others,  2. 
