362  CONTRIBUTIONS    TO    ECONOMIC    GEOLOGY,  1906,  PART    T. 
In  Indiana  71  glass  works  are  in  business,  this  number  including  16 
temporarily  not  in  operation.  Of  these  71  plants,  39  make  general 
Hint  ware,  17  window  glass,  3  plate  glass,  and  3  cast  and  rolled 
glass,  including  cathedral,  colored,  and  opalescent  glass;  9  confine 
their  product  to  green  and  amber  bottles,  and  some  green  and 
amber  ware  is  also  made  by  the  flint  factories. a 
The  glass  works  are  situated  mainly  in  the  gas  belt  and  coal  fields 
of  the  State.  With  the  gradual  lessening  of  the  natural-gas  sup- 
plies during  the  last  five  years,  the  growth  of  the  industry  in  Indiana 
has  received  a  check.  Many  factories  have  been  moved  to  Kansas 
and  others  have  been  moved  from  the  gas  fields  to  points  within  the 
Slate  where  cheap  coal  can  be  obtained.  The  introduction  of  glass- 
blowing  machinery  lias,  to  some  extent,  offset  the  increased  cost  of 
rue]  by  reducing  the  number  of  employees  and  enlarging  the  output 
of  the  works,  but  the  net  result  has  been  a  slight  loss  in  the  total 
value  of  products  since  1900. 
In  Ohio  there  are  50  glass  works,  one  of  which  is  temporarily  inac- 
tive. Of  these,  25  make  general  flintware;  16  window  glass,  1  plate 
glass,  and  2  cast  and  rolled  glass." 
The  glass-making  industry  in  Ohio  is  in  a  prosperous  condition. 
From  L900  to  1905  the  value  of  products  increased  98.5  per  cent,  and 
the  amount  paid  in  wages  increased  1 18.2  per  cent. 
PRODUCTION   OF    GLASS   SAND. 
The  following  table  shows  the  relation  of  production  and  value  of 
glass  sand>  produced  in  Indiana  and  Ohio  to  the  total  consumption 
of  the  material  in  these  States. 
Glass  sand  produced  and  consumedin  Indiana  and  Ohio  in  1905. b 
Production. 
Consumption. 
Produc- 
State. 
Quan- 
tity. 
Value. 
Quan- 
tity. 
Cost. 
tion  pro- 
portioned 
to  con- 
sumption. 
Short 
tons. 
Total. 
Average 
per  ton. 
Short 
tons. 
Total        Average 
per  ton. 
Per  cent. 
Indiana 
1,640 
76,  I'M 
$2,169 
7'-.  :w 
$1.32 
1.05 
193,000 
81,541 
$316, 265 
L79, 157 
2.20 
0  8.4 
Ohio 
93.  76 
From  these  figures  it  is  apparent  that  Indiana  is  producing  less  than 
1  per  cent  of  the  glass  sand  used  within  the  State;  also  that  the  sand 
produced  can  be  sold  for  about  81  per  cent  of  the  average  price  paid 
for  imported  sand.  This  is  a  perfectly  natural  condition,  since  the 
local  sand  has  the  advantage  of  a  differential  in  freight  rates  of  50 
a  Courtesy  of  The  Commoner  Publishing  Company,  Pittsburg,  Pa.,  January,  1907. 
b  Statistics  of  production  by  A.  T.  Coons:  Production  of  glass  sand  in  1905;  Mineral  Resources  U.  S. 
for  1905,  U.  S.  Geol.  Survey,  1906. 
