PUBLICATIONS  ON  CEMENTS. 
The  following  list  includes  the  principal  publications  by  the  United 
States  Geological  Survey,  or  by  members  of  its  staff,  on  cementing 
materials: 
Cummings,  U.     American   rock   cement.     A  series  of  annual  articles   on  natural 
cements,  appearing  in  the  volumes  of  the  Mineral  Resources^  TJ.  S. ,  previous  to  that  | 
for  1901. 
Duryee,  E.     Cement  investigations  in  Arizona.     In  Bulletin  U.  S.  Geol.  Survey,  | 
ISo.  213,  p.  372-380.     1903. 
Eckel,  E.  C.  Slag  cement  in  Alabama.  In  Mineral  Resources  for  1900,  pp.  747- 1 
748.     1901. 
The  manufacture  of  slag  cement.     In  Mineral  Industry,  vol.  10,  pp.  84-95. 
1902. 
The  classification  of  the  crystalline  cements.     In  Amer.  Geologist,  vol.  29 
p.  146-154.     1902. 
—  Portland  cement  manufacture.     In  Municipal  Engineering,  vol.  24,  p.  335- 
336;  vol.  25,  p.  1-3,  75-76,  147-150,  227-230,  405-406.     1903. 
-  The  materials  and  manufacture  of  Portland  cement.     In  Senate  Document 
No.  19,  58th  Congress,  1st  session,  p.  2-11.     1903. 
Newberry,  S.  B.  Portland  cement.  A  series  of  annual  articles  on  Portland 
cements,  appearing  in  the  various  volumes  of  the  Mineral  Resources,  U.  S.,  previous 
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  Alabama. 
In  Senate  Document  No.  19,  58th  Congress,  1st  session,  p.  12-23.     1903. 
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.  687-742.     1902. 
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