252  BIBLIOGRAPHY    OF    NORTH    AMERICAN    GEOLOGY 
Newsom  (John  F. )— Continued. 
2.  A  natural  gas  explosion  near  Waldron,  Indiana, 
Jour.  Geol.,  vol.  10,  pp.  303-814,  5  figs.,  1902. 
Describes  the  fissures  and  fractures  caused  by  the  explosion. 
3.  A  geologic  and  topographic  section  across  southern  Indiana  from  the  Ohio  River 
at  Hanover  to  the  Wabash  River  at  Vincennes,  with  a  discussion  of  the  general 
distribution  and  character  of  the  Knobstone  group  in  the  State  of  Indiana. 
Ind.,  Dept.  Geol.  &  Nat.  Res.,  26th  Ann.  Rept.,  pp.  227-302,  7  pis.,  19  figs.,  1903. 
Describes  topographic  and  drainage  features,  the  stratigraphy,  character,  and  geological  rela- 
tions of  formations  of  Ordovician,  Silurian,  Devonian,  and  Carboniferous  age,  and  discusses 
the  geologic  history  of  the  region. 
4.  Clastic  dikes. 
Geol.  Soc.  Am.,  Bull.,  vol.  14,  pp.  227-2G8,  11  pis.,  19  figs.,  1903. 
Describes  location,  geologic  relations,  character,  and  origin  of  clastic  dikes,  chiefly  those  of 
California,  and  gives  references  to  literature  in  which  clastic  dikes  are  described. 
Newton  (R.  Bullen). 
1.  List  of  Thomas  Say's  types  of  Maryland  (U.  S. )  Tertiary  mollusca  in  the  British 
Museum. 
Geol.  Mag.,  dec.  iv,  vol.  9,  pp.  303-305,  1902. 
New  York  State  Museum. 
1.  Economic  geology  of  New  York. 
N.  Y.  State  Mus.,  Handbook  17,  40  pp.,  1904. 
Gives  brief  accounts  of  the  occurrence  and  utilization  of  mineral  products  of  the  State  of  New 
York. 
Nicholls  (H.  A.  Alford). 
1.  Notes  on  the  recent  eruptions  of  Mt.  Pelee  [West  Indies]. 
Nature,  vol.  66,  pp.  638-639,  1902. 
Contains  daily  notes  of  the  recent  eruptions. 
Nichols  (Henry  W.). 
1.  Nitrates  in  cave  earths. 
Jour.  Geol.,  vol.  9,  pp.  236-243,  1901.     Abstract:  Am.  Geol.,  vol.  28,  p.  58,  1901. 
Reviews  paper  by  William  H.  Hess  on  the  same  subject,  gives  a  number  of  analyses  of  soil, 
limestone,  and  cave  earth,  and  discusses  the  origin  of  the  nitrates. 
2.  [In  discussion  of  paper  by  Eric  Hedburg  on  "The  Missouri  and  Arkansas  zinc 
mines."] 
Am.  Inst.  Mg.  Engrs.,  Trans.,  vol.  31,  pp.  1015-1021,  1902. 
Nichols  (J.  Clayton). 
1.  Notes  on  the  Pigholugan  and  Pigtao  gold  region,  Island  of  Mindanao,  Philippine 
Islands. 
Am.  Inst.  Mg.  Engrs.,  Trans.,  vol.  31,  pp.  611-616,  1902. 
Describes  the  occurrence  of  gold  veins  and  placers. 
Nicholson  (Frank). 
1.  The  Wisconsin  zinc-fields. 
Eng.  &  Mg.  Jour.,  vol.  76,  pp.  847-849,  illus.,  1903. 
Describes  the  general  geology  of  the  region  and  the  occurrence  and  character  of  the  zinc 
and  lead  ore  deposits  and  the  mining  operations. 
Nickles  (JohnM.). 
1.  Geological  section — St.  Louis  to  Shawneetown  [Illinois]. 
111.  Bd.  World's  Fair  Commissioners,  Rept.,  pp.  155-176,  1  pi.  (sections),  1895. 
Describes  geology  along  the  line  of  the  section  and  gives  records  of  borings  and  sections  of 
outcrops. 
2.  Geological  section  in  southern  Illinois  through  Waterloo,  Sparta,  Murphysboro, 
and  Olmstead. 
111.  Bd.  World's  Fair  Commissioners,  Rept.,  pp.  177-223,  1895. 
Describes  the  geology  along  the  line  of  the  section,  gives  records  of  borings  and  sections  of 
outcrops,  and  discusses  the  occurrence  and  exploitation  of  natural  gas  at  Sparta,  Illinois. 
