174  BIBLIOGRAPHY    OF    NORTH    AMERICAN    GEOLOGY 
Holway  (Ruliff  S.). 
1.  Eclogites  in  California. 
Jour.  Geol.,  vol.  12,  pp.  344-358,  5  figs.,  1904. 
Reviews  previous  work  upon  eclogites  (garnetiferous  augite  or  hornblende),  and  describes 
the  occurrence  and  petrographic  characters  of  eclogites  from  localities  in  California  and 
Oregon. 
Hopkins  (A.  D.). 
1:  Work  of  the  prehistoric  scolytid,  Phlceosinus  squalidens  Seudd. 
Can.  Geol.  Surv.,  Cont.  to  Paleont.,  vol.  2,  pt.  2,  pp.  91-92,  2  pis.,  1900. 
Hopkins  (Thomas  C. ). 
1.  Clays  and  clay  industries  of  Pennsylvania.    II.  Clays  of  southeastern  Pennsylvania 
(in  part). 
Pa.  St.  Coll.,  Ann.  Rept.,  1898-99,  Appendix,  76  pp.,  5  pis.,  1  rig.,  [1900?]. 
Describes  character  and  occurrence  of  clays  and  their  products  manufactured  in  the  State. 
2.  A  short  discussion  of  the  origin  of  the  ( !oal  Measure  lire  clays. 
Am.  Geol.,  vol.  28,  pp.  47-51,  1901. 
Reviews  the  evidences  of  the  formation  of  fire  clays  in  situ,  and  states  that  the  occurrence  of 
a  considerable  portion  of  them  is  better  explained  by  considering  them  as  transported  clays 
reduced  before  deposition. 
3.  Graphite  and  garnet. 
Mines  &  Minerals,  vol.  21,  p.  352,  1901. 
Describes  occurrence  in  Pennsylvania  and  other  regions. 
4.  Clays  and  clay  industries  of  Pennsylvania.     III.  Clays  of  the  Great  Valley  and 
South  Mountain  areas. 
Pa.  St.  Coll.,  Ann.  Rept.,  1899-1900,  Appendix,  45pp.,  [1901:]. 
Describes  character  and  occurrence  of  clays  and  products  manufactured  from  them. 
5.  Fireclays  of  the  Coal  Measures,  a  short  discussion  of  their  origin,  and  the  causes  of 
the  qualities  winch  render  them  more  or  less  refractory. 
Mines  &  Minerals,  vol.  22,  p.  296.  1902. 
6.  The  Lower  Carboniferous  area  in  Indiana. 
Abstract:  Science,  new  ser.,  vol.  15,  p.  83,  1902. 
7.  Glacial  climate. 
Onondaga  Acad.  Sci.,  Proc,  vol.  1.  pp.  74-81,  1903. 
Discusses  the  causes  assigned  for  the  climate  of  Glacial  times,  especially  tbe  hypothesis  of  the 
variation  in  amount  of  carb lioxide  in  the  atmosphere. 
8.  Lower  Carboniferous  area  in  Indiana. 
Abstract:  Geol.  Soc.  Am  ,  Bull.,  vol.  13,  pp.  519-521,  1903. 
Describes  briefly  the  Carboniferous  formations  of  the  region. 
9.  Mineral  resources  of  Onondaga  County,  New  York. 
X.  Y.  State  Mus.,  56th  Ann.  Rept.,  pp.  rl09-rll4,  1904. 
Describes  the  occurrence  and  production  of  building  stones,  clays,  and  other  economic 
resources. 
10.  The  geological  map  of  Indiana. 
Ind.,  Dept.  Geol.  &  Nat.  Res.,  28th  Ann.  Rept.,  pp.  11-14,  1904. 
Describes  the  preparation  of  the  geologic  map  of  the  State  of  Indiana  (scale:  4  miles  to  the 
inch)  accompanying  the  Twenty -eighth  Annual  Report  of  the  Department  of  Geology  and 
Natural  Resources  of  Indiana. 
11.  A  short  description  of  the  topography  of  Indiana  and  of  the  rocks  of  the  different 
geological  periods;  to  accompany  the  geological  map  of  the  State. 
Ind.,  Dept.  Geol.  &  Nat.  Res.,  28th  Ann.  Rept.,  pp.  15-77,  1904. 
The  part  on  the  Ordovician  and  the  Silurian  (pp.  21-39)  was  written  by  A.  F.  Foerste. 
12.  Contents  of  the  published  volumes  of  reports  of  the  Indiana  Geological  Survey, 
the  Departmentof  Geology  and  Natural  History,  and  the  Departmentof  Geology 
and  Natural  Resources. 
Ind.,  Dept.  Geol.  &  Nat.  Res.,  28th  Ann.  Rept.,  pp.  487-495,  1904. 
