374         CONTRIBUTIONS    TO    ECONOMIC    GEOLOGY      L906,   PART    1. 
to  medium-grained,  partly  angular  sand.  It  is  used  mostly  in  Mas 
sillon  by  manufacturers  of  green  and  amber  bottles.  An  analysis  of 
the  sand  is  given  on  page  o7().  The  Everhard  brick  plant,  consisting 
of  a  mill  and  6  down-draft  kilns  has  been  buill  in  the  southern  part 
of  the  quarry.  Here  fire  clay  mined  2\  miles  from  the  plant  is 
utilized  in  the  manufacture  of  a  line,  mottled,  fire-faced  brick. 
The  Sonnhalter  quarry,  adjoining  the  one  just  described,  pro] 
duces  glass  sand  and  an  even-grained,  pink  building  si  one.  At  this 
quarry  the  sand  is  washed  and  i>  dried  in  a  Ruggles-Cole  rotary 
dryer.      An  analysis  of  the  Sonnhalter  sand  is  given  on  page  -'->76. 
The  quarries  of  the  Massillon  Sand  and  Stone  Company  and  of  the 
Wetter  Steel  Sand  Company  are  also  in  the  Massillon  sandstone  at  a 
distance  of  one-half  mile  from  the  Sonnhalter  quarry.  These  firms 
arc  now  producing  mill  sands  rather  than  glass  sand,  for  which  they 
have  suitable  material. 
Smal]  quantities  of  glass  -mid  and  larger  quantities  of  sand  for 
metallurgical  purposes  are  produced  at  Barrs  Mills,  Dundee,  and 
Strasburg,  Tuscarawas  County;  Twinsburg,  Summit  County;  War- 
wick. Wayne  County;  killbuck,  Holmes  County,  and  Laylanda 
Coshocton  County,  all  in  east-central  Ohio. 
Akron. — The  quarry  of  the  Akron  White  Sand  Company  is  about 
:\  miles  uorthvesl  of  the  center  of  Akron,  on  t  he  hue  of  the  Northern 
Ohio  Railway,  on  tiie  brow  of  :i  -carp  overlooking  the  valley  of 
Cuyahoga  River.  Ai  this  place  12  to  20  feci  of  fine-grained,  sharp, 
gray  to  bull'  sandstone  above  and  16  feet  of  pebbly  conglomerate 
below    arc  ul  lli/.ed. 
The  sand  is  crushed,  rolled,  screened,  and  dried,  and  is  at  present 
all  sold  f<>r  steel  making,  while  the  coarse  pebbles  from  the  com 
glomerate  are  used  for  concrete  work. 
Niles.  The  National  Sand  and  Stone  Company  operates  a  large 
quarry  and  mill  aboul  1  miles  south-southwesl  of  Niles,  near  Austin- 
town,  on  the  Erie  Railroad.  Sandstone  of  Pennsylvanian  age  is 
quarried  here  from  a  large,  open  cut  25  feel  deep.  The  face  shows 
8  feci  of  yellow  to  reddish  sandstone  at  the  top,  with  15  feel  of  graja 
to  white  sandstone  below.  The  beds  have  a  slight  dip  to  the  north 
and  are  composed  of  a  moderately  coarse,  subangular  quartz  sand, 
showing  cross-bedding  and  containing  in  places  near  the  base  of 
the  quarry  some  carbonaceous  material  in  streaks  and  bands,  one 
of  which  reaches  6  inches  in  thickness.  The  sand  is  soiled  in  the 
quarry  and  four  grades  are  produced.  The  three  best  grades  are  sent 
to  glass  factories  iii  Pennsylvania,  principally  for  window  glass,  and 
the  fourth-grade  sand  is  sold  for  furnace  and  mill  purposes.  A  sym- 
metrically arranged  mill  completes  the  preparation  of  the  sand, 
which  passes  in  turn  through  a  high-speed  jaw  crusher,  a  wet  grinder, 
a  reel  screen,  three  sets  of  " auger"   washers,   further  screens,  and 
