424  CONTRIBUTIONS    TO    ECONOMIC    GEOLOGY,  1905. 
The  rational  analysis  of  Tennessee  ball  clay  No.  1  is  as  follows: 
Analysis  of  Tennessee  ball  clay  No.  .7. 
Clay  substanqe 8fi.  20 
Feldspar 2. 70 
Flint 11. 10 
Tennessee  ball  clay  No.  3. — This  clay  has  a  brown  color  when  dry,  mixes  well  with  water, 
and  will  pass  through  a  120-mesh  sieve  without  residue.  By  passing  it  through  a  175- 
mesh  sieve  it  leaves  10  per  cent  residue,  which  consists  mainly  of  fine  sand. 
The  shrinkage  at  cone  1  is  12.5  per  cent,  or  one-eighth:  at  cone  8  the  shrinkage  is  IS  per 
cent,  or  about  one-sixth.  The  color  of  the  clay  at  cone  0.010  is  white;  at  cone  1  the  color 
is  still  white,  and  at  cone  8  it  fuses  to  a  gray  body. 
The  rational  analysis  of  Tennessee  ball  clay  No.  3  is  as  follows: 
Analysis  of  Tennessee  ball  clay  No.  3. 
Clay  substance 91.35 
Feldspa  r 2. 70 
Flint 5. 95 
The  location  of  the  Peryear  pit  and  of  the  three  Mandle  pits  described  above  throws 
much  light  on  the  age  of  the  line  deposits  of  ball  and  sagger  clays  in  this  s  ction  of  the  State. 
The  lowest  member  of  the  Tertiary  which  has  been  recognized  in  Henry  County  is  the 
Porters  Creek  clay  or  "soapstone."  It  occurs  in  the  deep  ravine  at  Conyersville,  3  miles 
east  of  Peryear.  According  to  barometric  measurement,  the  Porters  Creek  clay  at  Con- 
yersville is  50  feet  lower  than  the  clay  pit  at  Peryear.  Wells  100  feet  deep  at  Peryear  get 
water  before  reaching  the  Porters  Creek  clay.  The  dip  to  the  west  is  therefore  at  least  30 
feet  per  mile.  The  Mandle  pits,  located  3  miles  west  and  north  of  Whit  lock,  are  at  least  5 
miles  wesl  of  the  Porters  Creek  outcrop,  and  are  therefore  in  the  lower  Tertiary.  The  age 
of  the  ball  clay  near  India  is  not  so  certain.  The  Porters  Creek  clay  outcrops  in  the  deep 
ravine  just  east  of  Paris  and  along  the  railroad  for  3  or  1  miles  to  the  southeast.  A  line 
drawn  from  Paris  to  Conyersville  would  pass  near  India.  This  line,  however,  represents 
the  western  edge  of  the  Porters  Creek  clay,  which  is  usually  3  to  1  miles  wide.  The  elevat  ion 
of  the  India  pit  is  400  feet  above  sea  level,  barometric  reading,  or  about  20  feet  lower  than 
the  most  western  outcrop  of  the  Porters  Creek  clay  at  Paris. 
Paris,  Henry  County.  A  small  stoneware  plant  is  located  \\  miles  east  of  Paris  on  the 
Louisville  and  Nashville  Railroad.  It  is  owned  and  operated  by  John  T.  Currier.  The 
clay  is  ground  and  tempered  in  a  2-horse  pug  mill  with  a  capacity  of  11,000  pounds  per  day. 
The  clay  is  used  as  it  conies  from  the  pit.  Twelve  hours  after  turning  the  ware  can  be 
placed  in  the  sunshine  without  cheeking.  Two  kilns  are  in  use,  with  a  combined  capacity 
of  5,000  gallons.     The  ware  is  glazed  with  Albany  slip. 
The  clay  comes  from  a  pit  one-half  mile  northeast  of  India,  on  the  west  side  of  the  road. 
It  underlies  4  to  5  feet  of  Lafayette  sand  and  gravel.  The  clay  has  but  little  grit ,  is  gray  to 
light  chocolate  in  color,  and  contains  very  small  flakes  of  mica. 
Hico,  Carroll  County. — White  stonewTare  clays  are  dug  from  pits  3  miles  southeast  of 
MeKenzie  and  shipped  to  potteries  at  East  Liverpool  and  Akron,  Ohio,  and  Louisville,  Ky. 
Similar  clays  occur  along  the  Louisville  and  Nashville  Railroad  just  south  of  MeKenzie. 
Gilmore,  Madison  County.— The  Southern  Tile  and  Brick  Works  has  the  largest  and  most 
complete  brick  plant  in  the  State.  The  plant  is  located  at  Gilmore  station,  5  miles  north 
of  Jackson,  on  the  Mobile  and  Ohio  Railroad.  Mr.  X.  B.  Wickersham  is  general  manager. 
It  has  been  in  operation  since  1903.  Fireproof,  dry  press,  and  stiff-mud  bricks  are  manu- 
factured. 
The  clay  for  the  fire  brick  is  ground  in  a  Wallace  pug  mill  and  molded  in  a  side-cut  stiff- 
mud  machine.  Common  clinker  is  used  instead  of  grog.  The  clinker  completely  burns  up 
and  leaves  the  bricks  porous  and  thus  permits  them  to  expand  on  heating.  The  output  is 
20,000  bricks  per  day. 
