270  BIBLIOGRAPHY    OF    NORTH    AMERICAN    GEOLOGY 
Phillips  (William  Battle)— Continued. 
13.  A  coking  coal  in  Chihuahua  [Mexico]. 
Eng.  &  Mg.  Jour.,  vol.  79,  pp.  G61-662,  1  fig.,  1905. 
Describes  the  occurrence,  character,  and  geological  relations  of  coal  beds  in  Chihuahua, 
Mexico. 
14.  The  quicksilver  deposits  of  Brewster  County)  Texas. 
Econ.  Geol.,  vol.  1,  pp.  155-162,  3  pis.,  1905. 
Describes  the  general  geology,  and  the  character,  occurrence,  and  relations  of  the  ore  depos- 
its of  cinnabar. 
Pierce  (S.  J.). 
1.  The  Cleveland  water-supply  tunnel  [Ohio]. 
Am.  Geol'.,  vol.  28,  pp.  380-385,  1901. 
Describes  the  quicksands  and  clays  and  other  material  penetrated  in  driving  this  tunnel. 
Pilsbry  (Henry  A.). 
1.  Crustacea  of  the  Cretaceous  formation  of  New  Jersey. 
Phil.  Acad.  Nat.  Sci.,  Proc.,1901,  pp.  111-118,  1  pi.,  1901. 
Piper  (C.  V.). 
1.  The  basalt  mounds  of  Columbia  lava. 
Science,  new  ser.,  vol.  21,  pp.  824-825,  1905. 
Describes  the  occurrence  of  these  mounds  in  eastern  Washington  and  their  nature,  and  dis- 
cusses their  origin. 
Pirsson  (Louis  Valentine). 
1.  Petrography  of  the  rocks  of  Yogo  Peak  [Montana]. 
Yale  Bicentennial  publications.    Cont.  to  Mineral,  and  Petrog.,  pp.  436-456,  1901.     (Abstract 
from  U.  S.  Geol,  Surv.,  20th  Ann.  Rept.,  pt.  3,  pp.  471-488,  1900.) 
2.  On  mordenite. 
Yale  Bicentennial  publications.    Cont.  to  Mineral,  and  Petrog.,  pp.  176-182,  1901.     (From 
Am.  Jour.  Sci.,  vol.  40,  pp.  232-237,  1890.) 
3.  On  the  petrography  of  Square  Butte  in  the  Highwood  Mountains  of  Montana. 
Yale  Bicentennial  publications.    Cont.  to  Mineral. and  Petrog., pp. 415-435, 1901.     (From  Geol. 
Soc.  Am.  Bull.,  vol.  6,  pp.  389-422,  1895.  i 
4.  Petrography  and  geology  of   the   igneous   rocks   of   the   Highwood  Mountains, 
Montana. 
U.  S.  Geol.  Surv.,  Bull.  no.  237,  208.  pp.,  7  pis.  and  8  figs.,  1905. 
5.  The  petrographic  province  of  central  Montana. 
Am.  Jour.  Sci.,  4th  ser.,  vol.  20,  pp.  35-49,  1905. 
Defines  the  province  as  shown  by  various  evidences  of  consanguinity,  gives  its  general  law, 
and  describes  the  geographic  arrangement  of  the  magmas,  their  differentiation,  and  type--. 
Pirsson  (  L.  V.)  and  Washington  (H.  S. ). 
1.  Contributions  to  the  geology  of  New   Hampshire.      I.  Geology  of  the  Belknap 
Mountains. 
Am.  Jour.  Sci.,  till  ser.,  vol.  20,  pp.  344-352,  1  pi.  (map),  1905. 
Describes  the  occurrence  and  characters  of  a  group  of  igneous  rocks. 
Pirsson  (Louis  V.),  Cross  (Whitman),  Iddings   (Joseph  P.),  and   Washington 
(HenryS.). 
1.  A  quantitative  chemico-mineralogical  classification  and  nomenclature  of  igneous 
r  <  »cks. 
2.   Qualitative  classification  of  igneous  rocks. 
See  Cpss  (W.),  Iddings  (J.  P.),  Pirsson  (L.  V.),  and  Washington  (H.  S.),  1,  2. 
Pirsson  (LouisY.),  Penfield  (Samuel  L. )  and. 
1.  Contributions  to'Djneralogy  and  petrography,  from  the  laboratories  of  the  Shef- 
field Scientific  School  of  Yale  University. 
See  Penfield  (S.  L.)  and?"*88011  (L-  V.),  I. 
