smith!         GKAOTTE    TN    PENOBSCOT    BAY    QUADRANGLE,     Ml'..  491 
facers  necessary  for  a  large  quarry.  At  this  company's  Palmer 
quarry,  at  the  mouth  of  Long  Cove  on  the  same  island,  there  is  a  giant 
lathe,  designed  by  Cheney  &  Spiller,  of  Boston,  and  built  by  the  Phil- 
adelphia Rolling  Machine  Company,  which  will  turn  a  monolithic 
column  TO  feet  in  length  and  7  feet  in  diameter. 
On  Hurricane  Island  the  Booth  Brothers  and  the  Hurricane  Island 
Granite  Company  are  operating  two  quarry  openings.  Their  equip- 
ment, which  well  illustrates  the  capacity  of  these  larger  quarries, 
consist's  of  2  locomotive  cranes,  5  derricks  with  steam  hoists,  4  steam 
drills,  10  pneumatic  plug  drills,  8  pneumatic  dressers,  34  pneumatic 
hammers,  '2  compressors,  1  lathe,  which  will  turn  a  column  20  feet 
in  length  and  3  feet  in  diameter,  4  polishing  lathes,  0  Nelson  pol- 
ishers, 4  pendulum  polishers,  and  one  Cavicchi  pneumatic  polishing 
machine. 
The  Rodgers  quarry,  on  the  west  shore  of  Webb  Cove,  in  Stoning- 
ton,  is  also  equipped  with  both  steam  and  pneumatic  drills,  and 
pneumatic  surfacers,  0  hoisting  engines,  10  derricks,  a  10-ton  crane, 
and  a  railway  and  locomotive.  On  Crotch  Island  the  Ryan-Parker 
Construction  Company  operates  a  large  quarry  with  extensive  dress- 
ing sheds,  with  full  steam  and  pneumatic  equipment,  as  well  as  a 
railway,  running  to  the  two  docks  and  the  entire  length  of  the 
quarry.  John  S.  (loss  has  a  well-equipped  quarry  adjoining  the  last- 
mentioned  quarry,  and  also  one  on  Moose  Island,  on  the  opposite  side 
of  Deer  Island  Thorofare. 
The  topographic  features  of  the  granite  coast  of  this  region  are 
such  as  to  facilitate  the  quarrying  operations.  In  most  cases  the 
quarries  are  opened  on  the  slopes  of  hills  rising  directly  from  the 
shore,  so  that  although  the  older  quarries  have  been  operated  from 
twenty-five  to  fifty  years  the  present  conditions  favor  continued  pro- 
duction without  increase  in  expense.  The  larger  part  of  the  equip- 
ment of  these  quarries,  therefore,  is  connected  with  the  finishing  of 
the  product  rather  than  with  the  quarrying  of  the  granite  blocks. 
Production. — The  greater  part  of  the  output  of  the  Penobscot  Bay 
quarries  in  1903  was  in  the  form  of  dressed  granite  for  building  pur- 
poses and  paving  blocks.  The  value  of  granite  quarried  and  dressed 
within  this  quadrangle  that  year  was  o\-er  one-half  the  output  of  (lie 
Slate  and  nearly  one-sixth  the  total  production  of  that  class  of  stone 
in  the  United  States.  The  paving-block  production  is  only  one-half 
that  of  the  dressed  granite,  but  amounts  to  nearly  one-fourth  the 
product  of  the  United  States  and  exceeds  the  output  of  Massachusetts. 
Other  stone  quarried  here  is  in  the  form  of  dimension  material, 
"random,"  and  curbing,  and  some,  notably  from  the  quarry  of  the 
S.  Clinton  Sherwood  Company,  on  Thurlow  Knob,  is  shipped  in  tic 
rough  to  be  dressed  elsewhere  in  monumental  works. 
An  interesting  fact  concerning  these  quarries  is  their  capability  t<> 
