BIBLIOGRAPHY  AND  INDEX  OF  NORTH  AMERICAN 
GEOLOGY,  PALEONTOLOGY,  PETROLOGY,  AND 
MINERALOGY  FOR  1901-1905,  INCLUSIVE. 
By  Fred  Boughton  Weeks. 
INTRODUCTION. 
This  bulletin  is  a  combination  of  the  bibliographies  published  each 
year  from  1901  to  1901,  inclusive.  These  have  appeared  as  Bulletins 
Nos.  203,  221,  240,  and  271.  With  these  the  bibliography  of  the 
literature  for  the  year  1905  has  been  combined.  The  papers  have 
been  arranged  alphabetically  by  authors'  names  and  the  entries  num- 
bered consecutively  under  each  author.  In  addition  to  the  full  title 
of  the  paper  and  an  abbreviated  reference  to  the  publication  in  which 
it  appears  a  brief  statement  of  the  contents  is  given  when  the  title  of 
the  paper  is  not  fully  explanatory. 
The  index,  in  which  reference  to  the  bibliography  is  made  by  author 
and  number  of  paper,  is  preceded  by  a  key  to  its  arrangement,  show- 
ing the  subject  headings  used  and  their  subdivisions. 
Mr.  J.  M.  Nickles,  who  has  assisted  for  the  last  three  years  in  the 
preparation  of  these  bibliographies,  has  performed  similar  services  in 
the  preparation  of  this  bulletin.  Its  completeness  and  accuracy  are 
largely  due  to  his  industry  and  attention  to  details. 
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