FOR    THE    YEARS   1901-1905,   INCLUSIVE. 
Beck  ( Richard ) -  -Conti nued. 
2.  The  nature  of  ore  deposits.     Translated  and  revised  by  Walter  Harvey  Weed. 
New  York,  The  Engineering  and  Mining  Journal,  1905.    2  vols.,  685  pp.,  272  figs,  and  a  map. 
Contains  descriptions  of  American  ore  deposits. 
Becke  (F.). 
1.  Optische  Orientirung  des  Albit  von  Amelia,  Virginia. 
Tschermak's  Min.  u.  Petrogr.  Mitt.,N.  F.,  Bd.  19,  pp.  321-335,  5  figs.,  1900. 
Describes  crystallographic  features  of  an  albite  from  Amelia,  Virginia. 
Becker  (George  F. ). 
1.  Report  on  the  geology  of  the  Philippine  Islands,  followed  by  a  version  of  "  Ueber 
Tertiare  fossilien  von  den  Philippinen"  (1895),  by  K.  Martin. 
U.  S.  Geol.  Surv.,  21st  Ann.  Kept.,  pt.  3,  pp.  493-625,  3  pis.,  2  figs.,  1901.  Abstract:  Am.  Geol., 
vol.  28,  pp.  126-127,  1901. 
Describes  the  character  of  the  igneous  rocks  and  the  mineral  resources.  Includes  a  bibliog- 
raphy and  a  translation  of  a  paper  by  K.  Martin  on  the  Tertiary  fossils  of  the  Philippines. 
2.  Construction  of  geophysical  laboratory. 
Carnegie  Inst,  of  Wash.,  Yearb.  no.  2,  1903,  pp.  185-194,  1904. 
3.  Experiments  on  schistosity  and  slaty  cleavage. 
U.  S.  Geol.  Surv.,  Bull.  no.  241,  34  pp.,  7  pis.,  1904. 
Describes  experiments  to  determine  the  cause  of  cleavage  and  schistosity  in  rocks,  and  dis- 
cusses the  results  obtained. 
4.  Present  problems  of  geophysics. 
Science,  new  ser.,  vol.  20,  pp.  545-556,  1  01;  Am.  Geol.,  vol.  35,  pp.  4-22,  1905;  Eng.  &Mg.Jour., 
vol.  78,  pp.  743-744,  1904  (in  part) . 
5.  The  isomorphism  and  thermal  properties  of  the  feldspars.     Introduction. 
Carnegie  Inst,  of  Wash.,  Publ.  no.  31,  pp.  3-12,  1905. 
6.  Simultaneous  joints. 
Wash.  Acad.  Sci.,  Proc,  vol.  7,  pp.  267-275,  1  pi.,  1905;  Eng.  &  Mg.  Jour.,  vol.  79,  pp.  1182-1184, 
9  figs.,  1905. 
Discusses  systems  of  joints  of  simultaneous  origin  and  how  they  were  produced. 
Becker  (George  F. )  and  Day  (Arthur  L. ). 
1.  The  linear  force  of  growing  crystals. 
Wash.  Acad.  Sci.,  Proc,  vol.  7,  pp.  283-288,  1  fig.,  1905. 
Beecher  (Charles  Emerson). 
1.  Studies  in  evolution;  mainly  reprints  of  occasional  papers  selected  from  the  pub- 
lications of  the  laboratory  of  invertebrate  paleontology,  Peabody  Museum,  Yale 
University. 
Yale  Bicentennial  Publications,  638  pp.  34  pis.,  132  figs.,  1901.    Charles  Scribner's  Sons,  New 
York. 
Contains  discussions  on  the  origin  and  significance  of  spines,  structure  and  development  of 
trilobites,  studies  in  the  development  of  the  Brachiopoda,  development  of  a  Paleozoic  porif 
erous  coral,  symmetrical  cell  development  in  the  FavositideE,  and  development  of  the  shell 
in  the  genus  Tornoceras  Hyatt. 
2.  Note  on  the  Cambrian  fossils  of  St.  Francois  County,  Missouri. 
Am.  Jour.  Sci.,  4th  ser.,  vol.  12,  pp.  362-363,  1901. 
Discusses  the  fossil  evidence  indicating  that  a  considerable  thickness  of  the  rocks  of  this 
region  are  to  be  referred  to  the  Cambrian. 
3.  Discovery  of  eurypterid  remains  in  the  Cambrian  of  Missouri. 
Am.  Jour.  Sci.,  4th  ser.,  vol.  12,  pp.  364-366,  1  pi.,  1901. 
Describes  Strabops  thatch eri  n.  gen.  et  sp. 
4.  The  ventral  integument  of  trilobites. 
Am.  Jour.  Sci.,  4th  ser.,  vol.  13,  pp.  165-174,  4  pis.,  1  fig.,  1902. 
Describes  the  characters  of  the  ventral  integuments  in  Triarthrus  which  demonstrate  that 
.the  conclusions  of  Jaeke]  in  bis  study  of  Ptycboparia  are  erroneous. 
