CKIDEB.] 
CEMENT    RESOURCES    OF    NORTHEAST    MISSISSIPPI. 
521 
For  comparison,  analyses  of  the  raw  materials  and  product  of  the 
Alabama  Portland  Cement  Company  are  given  below.  The  plant 
of  this  company  is  located  at  Demopolis,  Ala.,  and  the  raw  materials 
used  are  the  Selma  chalk  and  an  overlying  residual  clay. 
Analyses  of  cement  materials  and  cement,  Demopolis,  Ala. 
1. 
2. 
3. 
4. 
55.64 
26.25 
.91 
1.97 
Tr. 
13.80 
5. 
6. 
7. 
8. 
9. 
Silica  (Si02) 
Alumina  ( ALO3) 
13.32 
1  7.74 
41.41 
.67 
.27 
[33. 26 
9.88 
6.20 
43.19 
.51 
n.d. 
34.50 
7.64 
7.62 
45.20 
.50 
1.62 
36.06 
20.54 
8. 55 
63.85 
.66 
n.d. 
1 .  34 
20.25 
13.44 
63.60 
1.03 
.41 
19.99 
13.63 
63.82 
.83 
L.  16 
19.99 
13. 74 
61.36 
.61 
n.d. 
19. 56 
Iron  oxide  ( FeL»Oa) 
Lime  (CaO)_. 
12. 16 
62.27 
Magnesia  (MgO)  -   
.64 
Sulphur  trioxide  ( SO;j) 
Carbon  dioxide  (C02) 
Water 
.54 
0  4. 83 
"  In 
•liidin 
;•  alkal 
ies. 
1.  Limestone ;  F.  r.  Dewey,  analyst. 
2.  Limestone;  analysis  furnished  by  manager. 
3.  Limestone ;  R.  S.  Hodges,  analyst. 
4.  Clay  ;  R.  S.  Hodges,  analyst. 
5.  Cement ;  R.  W.  Clark,  chief  chemist  U.  S.  Geol.  Survey,  analyst. 
6.  Cement ;  A.  W.  Dow,  analyst. 
7.  Cement ;  R.  S.  Hodges,  analyst. 
8.  Cement ;  analysis  furnished  by  manager. 
9.  Cement ;  analysis  published  in  Cement  Directory,  2d  ed.,  p.  254. 
