II  ADVERTISEMENT. 
131.  Report  of   progress  of  the  division  of   hydrography   for  the  calendar  years   1893  and  1891,  by 
Frederick  Haynes  Newell.    1895.    126  pp. 
135.  Bibliography  and  index  of  North  American  geology,  paleontology,  petrology,  and  mineralogy 
for  the  year  1894.  by  Fred  Boughton  Weeks.    1896.     141  pp. 
140.  Report  of  progress  of  the  division  of  hydrography   for  the  calendar  year  1895.  by  Frederick 
Haynes  Newell.    1896.    356  pp. 
146.  Bibliography  and  index  of  North  American  geology,  paleontology,  petrology,  and  mineralogy 
for  the  year  1895,  by  Fred  Boughton  Weeks.    1896.    130  pp. 
149.  Bibliography  and  index  of  North  American  geology,  paleontology,  petrology,  and  mineralogy 
for  the  year  1896,  by  Fred  Boughton  Weeks.    1897.    152  pp. 
156.  Bibliography  and  index  of  North  American  geology,  paleontology,  petrology,  and  mineralogy 
for  the  year  1897,  by  Fred  Boughton  Weeks.    1898.    130  pp. 
162.  Bibliography  and  index  of  North  American  geology,  paleontology,  petrology,  and  mineralogy 
for  the  year  1898,  by  Fred  Boughton  Weeks.    1899.    163  pp. 
172.  Bibliography  and  index  of  North  American  geology,  paleontology,  petrology,  and  mineralogy 
for  the  year  1899,  by  Fred  Boughton  Weeks.    1900.    141  pp. 
177.  Catalogue  and  index  of  the  publications  of  the  United  States  Geological  Survey.  1880-1901,  by 
Philip  Creveling  Warman.    1901.    858  pp. 
188.  Bibliography  of  North  American  geology,  paleontology,  petrology,  and  mineralogy  for  the  years 
1892-1900,  inclusive,  by  Fred  Boughton  Weeks.    1902.    717  pp. 
189.  Index  to  North  American  geology,  paleontology,  petrology,  and  mineralogy  tor  the  years  18.92- 
1900,  inclusive,  by  Fred  Boughton  Weeks.    1902.    337  pp. 
203.  Bibliography  and  index  of  North  American  geology,  paleontology,  petrology,  and  mineralogy 
for  the  year  1901,  by  Fred  Boughton  Weeks.    1902.    144  pp. 
215.  Catalogue  and  index  of  the  publications  of  the  United  States  Geological  Survey.  1901  to  1903,  by 
Philip  Creveling  Warman.    1903.    234  pp. 
221.  Bibliography  and  index  of  North  American  geology,  paleontology,  petrology,  and  mineralogy 
for  the  year  1902,  by  Fred  Boughton  Weeks.    1903.    200  pp. 
222.  Catalogue  and  index  of  the  publications  of  the  Hayden,  King,  Powell,  and  Wheeler  surveys,  by 
L.  F.  Schmeckebier.    1904.    208  pp. 
227.  The  United  States  Geological  Survey,  its  origin,  development,  organization,  and  operations,  1904. 
205  pp. 
240.  Bibliography  and  index  of  North  American  geology,  paleontology,  petrology,  and  mineralogy 
for  the  year  1903,  by  Fred  Boughton  Weeks.    1904.    243  pp. 
271.  Bibliography  and  index  of  North  American  geology,  paleontology,  petrology,  and  mineralogy 
for  the  year  1904,  by  Fred  Boughton  Weeks.    1905.    218  pp. 
301.  Bibliography  and  index  of  North  American  geology,  paleontology,  petrology,  and  mineralogy 
for  the  years  1901-1905,  inclusive,  by  Fred  Boughton  Weeks.    1906.    770  pp. 
Correspondence  should  be  addrest  to 
The  Dikectok, 
United  States  Geological  Survey, 
Washington,  1).  C. 
(  October,  L906. 
o 
