PUBLICATIONS  ON  PORTLAND,  NATURAL,  AND  PUZZOLAN  CEMENTS. 
The  following  list  includes  the  principal  publications  by  the  United 
States  Geological  Survey,  or  by  members  of  its  staff,  on  cement 
materials : 
Catlett,  C.  Cement  resources  of  the  Valley  of  Virginia.  In  Bulletin  LT.  S. 
Geol.  Survey  No.  225,  pp.  457-461.     1904. 
Cummings,  IT.  American  rock  cement.  A  series  of  annual  articles  on  natural 
cements,  appearing  in  the  volumes  of  the  Mineral  Resources,  U.  S.,  previous  to 
that  for  1901. 
Duryee,  E.  Cement  investigations  in  Arizona.  In  Bulletin  U.  S.  Geol.  Sur- 
vey No.  213,  pp.  372-380.     1903. 
Eckel,  E.  C.  Slag  cement  in  Alabama.  In  Mineral  Resources  for  L900,  pp. 
747-748.     1901. 
The  manufacture  of  slag  cement.     In  Mineral   Industry,   vol.   10,   pp, 
84-95.     1902. 
Tln>  classification  of  the  crystalline  cements.     In  Amer.  Geologist,  vol. 
29,  pp.  14G-154.     1902. 
Portland-cement  manufacture.     In  Municipal  Engineering,  vol.  24,  pp. 
335-330;    vol.  25,  pp.  1-3,  75-70,  147-150,  227-230,  405-400.     1903. 
The  materials  and  manufacture  of  Portland  cement.  In  Senate  Docu- 
ment No.  19,  58th  Congress,  1st  session,  pp.  2-11.     1903. 
Cement-rock  deposits  of  the  Lehigh  district.     In  Bulletin  U.  S.  Geol. 
Survey  No.  225,  pp.  448-450.     1904. 
Cement  materials  and  cement  industries  of  the  United  States.  Bulle- 
tin U.  S.  Geol.  Survey  No.  243.     1905. 
Newberry,  S.  B.  Portland  cement.  A  series  of  annual  articles  on  Portland 
cements,  appearing  in  the  various  volumes  of  the  Mineral  Resources,  U.  S.,  pre- 
vious to  that  for  1901. 
Russell,  I.  C.  The  Portland-cement  industry  in  Michigan.  In  Twenty 
second  Ann.  Rept.  U.  S.  Geol.  Survey,  pt.  3,  pp.  629-686.     1902. 
Smith,  E.  A.  The  Portland-cement  materials  of  central  and  southern  Ala- 
bama.    In  Senate  Document  No.  19.  58th  Congress.  1st  session,  pp.  12-2.'!.     1903. 
Cement  resources  of  Alabama.     In  Bulletin   U.    S.   Geol.   Survey  No. 
225,  pp.  424-147.     1904. 
Taff,  J.  A.  Chalk  of  southwestern  Arkansas,  with  notes  on  its  adaptability 
to  the  manufacture  of  hydraulic  cements.  In  Twenty-second  Ann.  Rept.  U.  S. 
Geol.  Survey,  pt.  3,  pp.  087-742.     1902. 
Bull.  260— 05  m 35  545 
