FOR    THE    YEARS    1901-1905,   INCLUSIVE.  39 
Blake  (William  P.) — Continued. 
9.  Arizona  diatomite. 
Wis.  Acad.  Sci.,  Trans.,  vol.  14,  pt.  1,  pp.  107-111,  6  pis.,  1903. 
Gives  notes  upon  and  lists  of  species  of  diatoms  obtained  from  deposits  of  diatomaceous  earth 
in  the  valley  of  the  San  Pedro,  Arizona. 
10.  Diatom-earth  in  Arizona. 
Am.  Inst.  Mg.  Engrs.,  Trans.,  vol.  33,  pp.  38-45,  1903. 
Describes  occurrence  and  character  of  diatomaceous  deposits,  and  discusses  their  origin  and 
economic  value. 
11.  Origin  of  pebble-covered  plains  in  desert  regions. 
Eng.  &  Mg.  Jour.,  vol.75,  p.  632,  1903;  Am.  Inst.  Mg.  Engrs.,  Trans.,  vol.  34,  pp.  161-162, 1904. 
12.  Tombstone  and  its  mines. 
Am.  Inst.  Mg.  Engrs.,  Trans.,  vol.  34,  pp.  668-670,  1904. 
Gives  observations  on  the  occurrence  of  ore  deposits,  and  discusses  the  origin  of  certain  man- 
ganiferous  ores. 
13.  Geology  of  Arizona. 
Rept.  of  the  governor  of  Ariz,  to  the  Secretary  of  the  Interior  for  the  year  ended  June  30 
1903,  pp.  126-135,  1903. 
Gives  a  general  outline  of  the  geology  of  Arizona. 
14.  Gypsum  deposits  in  Arizona. 
t  U.  S.  Geol.  Surv.,  Bull.  no.  223,  pp.  100-101,  1904. 
Describes  character  and  occurrence  of  gypsum  deposits  in  Arizona. 
15.  Superficial  blackening  and  discoloration  of  rocks,  especially  in  desert  regions. 
Am.  Inst.  Mr.  Engrs.,  Trans.,  vol.  35,  pp.  371-375,  1905. 
Describes  surricial  blackening  of  rocks  and  discusses  its  origin. 
16.  Copper  ore  and  garnet  in  association. 
Am.  Inst,  Mg.  Engrs.,  Trans.,  vol.  34,  pp.   886-890,  1904.     Mg.  &  Sci.  Press,  vol.  89,  pp.  72-73, 
1904.  Mg.  World,  vol.  21,  p.  175,  1904. 
Describes  occurrences  of  copper  ore  and  garnet  in  association,  and  discusses  their  origin. 
17.  Evidences  of  plication  in  the  rocks  of  Cananea,  Sonora  [Arizona]. 
Am.  Inst.  Mg.  Engrs.,  Trans.,  vol.  35,  pp.  551-552,  1905.     Mg.  Rep.,  vol.  50,  pp.  586-587,  1904. 
18.  Iodobromite  in  Arizona. 
Am.  Jour.  Sci.,  4th  ser.,  vol.  19,  p.  230,  1905. 
Describes  the  occurrence,  characters,  and  composition. 
19.  Origin  of  orbicular  and  concretionary  structure. 
Am.  Inst,  Mg.  Engrs.,  Bi-mo.  Bull.,  no.  4,  pp.  677,  6S2,  1  pi.,  1905. 
Blakemore  (William). 
1.  Pioneer  work  in  the  Crows  Nest  coal  areas  [Canada]. 
Can.  Mg.  Rev.,  vol.  20,  pp.  127-132,  3  figs.,  1901;  Can.  Mg.  Inst,,  Jour.,  vol.  4,  pp.  230-243,  3  figs. 
1901. 
Describes  the  occurrence  of  the  coal  in  Cretaceous  strata. 
2.  The  iron  ore  deposits  near  Kitchener,  B.  C. 
Can.  Mg.  Inst.,  Jour.,  vol.  5,  pp.  76-80,  5  pis.,  1902.    Abstract:  Eng.  A  Mg.  Jour.,  vol.  73,  pp. 
382-383,  1902.  • 
3.  Graham  Island  coal  [British  Columbia]. 
Eng.  &  Mg.  Jour.,  vol.  78,  p.  631,  1904. 
Describes  the  occurrence  of  workable  coal  beds. 
Blasdale  (Walter  C). 
1.  Contribution  to  the  mineralogy  of  California. 
Univ.  of  Cal.,  Dept,  of  Geol.,  Bull.,  vol.  2,  pp.  327-348,  1901. 
Describes  material  from  the  Berkeley  Hills,  Cal. 
Blatchford  (John). 
1.  The  Postdam  formation  of  Bald  Mountain  district  [South  Dakota]. 
Mg.  &  Sci.  Press,  vol.  87,  p.  167,  1903. 
Describes  the  occurrence  of  the  ore  deposits. 
