186  BIBLIOGRAPHY    OF    NORTH    AMERICAN    GEOLOGY 
Johnson  (William  H.). 
1.  The  lead  and  zinc  fields  of  the  Ozark  uplift. 
Am.  Bur.  Geog.,  Bull.,  vol.  2,  pp.  59-73,  illus.,  1901. 
Gives  a  general  account  of  the  development  of  the  Missouri-Arkansas-Kansas  lead  and  zinc 
mining  district,  and  discusses  briefly  the  general  geology  and  the  formation  and  character 
of  the  ores. 
Johnston  (J.  F.  E.). 
1.  Eastern  part  of  the  Abitibi  region. 
Can.  Geol.  Surv.,  Summ.  Kept,  for  1901,  pp.  128-141,  1902. 
Describes  the  author's  observations  in  this  region. 
2.  Geology  of  part  of  the  County  of  Ottawa  [Quebec]. 
Can.  Geol.  Surv.,  Summ.  Rept.  for  1904,  pp.  239-250,  1905. 
Johnston  (R.  A.  A.). 
1.  Bulletin  on  molybdenum  and  tungsten. 
Can.  Geol.  Surv.,  Min.  Res.  of  Can.,  Bull,  on  Molybdenum  and  Tungsten,  16  pp.,  1904. 
Describes  characters,  uses,  etc.,  of  molybdenum  and  tungsten,  and  gives  a  list  of  their  occur- 
rences in  Canada. 
2.  The  copper  claims  of  Aspen  Grove  and  Aberdeen  Camp,  B.  C. 
Can.  Geol.  Surv.,  Summ.  Rept.  for  1904,  pp.  74-80,  1905. 
3.  On  the  meteorite  which  fell  near  the  village  of  Shelbiirne,  township  of  Melanc- 
thon,  Ontario,  in  August,  1904. 
Can.  Geol.  Surv.,  Summ.  Rept.  for  1904,  pp.  332-336,  1905. 
Joly  (Henri). 
1.  Notice  sur  le  Dr.  Professor  Charles  Othoniel  Marsh  (  29  octobre  1831-18  mars  1899). 
Angers,  Bull  de  la  Soc.  d'Etud.  Sci.,  new  ser.,  vol.  30,  pp.  114-117,  1901. 
Joly  (J.). 
1.   An  estimate  of  the  geological  age  of  the  earth. 
Smith  Inst.,  Ann.  Rept.  1899,  pp.  247-288,  1901. 
Jonas  (Anna  I.). 
1.  Serpentines  in  the  neighborhood  of  Philadelphia. 
Am.  Geol.,  vol.  36,  pp.  296-304,  190."). 
Reviews  the  occurrence  and  origin  of  known  serpentines  and  describes  more  particularly  the 
serpentine  dikes  in  the  neighborhood  of  Philadelphia,  Pa. 
Jones  (Alfred  W.). 
1.  Further  studies  in  the  Mentor  beds  [Kansas]. 
Kans.  Acad.  Sci.,  Trans.,  vol.  L8,  pp.  104-105,  1903. 
2.  The  fauna  of  the  Mentor. 
Kans.  Acad.  Sci.,  Trans.,  vol.  19,  p.  L22,  1905. 
A  list  of  the  marine  fossils  found  in  the  Mentor  beds  of  the  Kansas  Carboniferous. 
Jones  (Fayette  Alexander). 
1.  New  Mexico  mines  and  minerals.     World's  Fair  edition,  1904. 
Santa  Fe,  N.  M.,  The  New  Mexican  Printing  Company,  1904.    349  pp.,  50  figs. 
Includes  a  brief  account  of  the  general  geology,  and  observations  on  the  occurrence,  geologic 
relations,  and  character  of  various  ore  deposits,  mining  and  production  of  metals,  etc. 
Gives  a  list  of  minerals  occurring  in  New  Mexico. 
Jones  (F.  0.). 
1.  The  formation  and  geology  of  the  salt  deposits. 
Sci.  Am.,  vol.  87,  p.  59,  3  figs.,  1902. 
Describes  the  formation  and  occurrence  of  deposits  of  salt. 
Jones  (S.  P.). 
1.  The  geology  of  the  Tallulah  Gorge  [Georgia]. 
Am.  Geol.,  vol.  27,  pp.  67-75,  3  pis.,  3  figs.,  1901. 
Describes  the  physiographic  features  of  the  region  and  the  origin  of  the  gorge, 
