456  CONTRIBUTIONS    TO    ECONOMIC    GEOLOGY,   L905. 
Analyses  of  glass  sands  mined, 
Location  of  mine  or  quarry. 
ILLINOIS. 
( >ttawa  .  Lasalle  County 
.South  Ottawa.  Lasalle  County.. 
Wedron,  Lasalle  County 
I'tica.  Lasalle  County 
MISSOURI. 
Klondike,  St.  Charles  County  .  .  . 
Grays  SummM  ,  Franklin  County 
Jefferson  County,  near  Pacific. . 
I  >perator. 
( >t  tawa  Silica  Co 
United  States  Silica  Co.  .  .  . 
Wedron  White  Sand  Co. .. 
E.  J.  Reynolds  &  Co 
Tavern  Koek  Sand  c<> 
w  hite  Sand  Co.  of  Missouri 
Missouri  Silica  Co 
Constituent. 
Silica. 
(SiOj). 
99.  45 
99.89 
99.89 
99.576 
99.97 
99.839 
99.69 
Magnesia 
(MgO). 
Trace. 
Il.li! 
.01 
.0()L> 
Lime 
(CaO)] 
o.  13 
.mi 
.00 
.0197 
Physical  properties  of  glass  sands, 
Locality. 
<  tperator. 
Ottawa,  111 
Otta  -\a  Silica  Co 
Do 
do 
Do     
do 
Do 
Utica,  11! 
E    i    I:--,  nolds  &  Co 
Sand  Co 
Do 
.do 
ho 
..do 
Grays  Summ 
Do 
t.  Mo.. 
\\  hite  Sand  Co.  of  Missouri. 
.do 
Pacific  Whit'  Sand  Co 
Do 
Missouri  Silica  Co 
Dm          
Pacific  <  (lass  Sand  Co 
Do     
.      ...do 
Do 
Crystal  City. 
Do 
Mo 

Pittsburg  P]  Lti   i 
.do 
Berkeley  Spr 
Va. 
ings,  W. 
\\  i  -i  \   rginia  Sa ad  Co. .  . 
Sample 
i  ine  i  grained 
nd  coarse  mixed 
I  oarsesl  grained 
Crude,  direct   from  pit. .  . 
Crude,  from  .;m- 
Exl  ra  quality 
We  rage  quality 
i   nidc.  direct  from  pi  I 
Finished  product 
('rude,  from  quarry 
Finished  product 
1  >irei  i  !  rv 
Prepared  Eor  plate 
Dried,  no1    i  i 
run 
l  repared 
.\  verage  mine  run 
•  olor. 
Very  faint  \  ellow 
White 
Crushed  sandstone,  fin- 
d  producl . 
( I  ravish  white 
( i  raj  ish  yellow 
White 
Faint  pinkish  yellow. 
u  hite 
....do 
Verj  lighl  gray 
I  ainl   pinkish  white. 
I  -'a  mi!  yellow 
Laint  yellow  ish  w  hit 
Faint  yellow 
do. 
do 
White,  with  faint  ye 
low  lumps. 
Grayish  white 
