Storage  of  watery  and  piping.
After  the  well  or  spring  is  ready  and  tested,  the
attention  should  be  directed  to  the  proper  means  of
storage  of  the  water,  so  that  a  supply  may  always
be  at  hand  without  the  continuous  operation  of  the
pump.  This  is  usually  secured  by  erecting  an  ele-
vated supply-tank  on  a  sub-structure  of  suflicient
height  to  deliver  the  water  to  the  various  points
where  it  will  be  used.  If  the  water  is  intended  only
for  house  use  and  for  live-stock,  the  sub-structure
need  be  only  ten  feet  in  height ;  for  hothouse  uses
the  bottom  of  the  tank  should  be  sixteen  feet  above
the  level  of  the  ground  ;  for  lawn  sprinkling  and  to
supply  water  in  the  second  story  of  buildings  the
bottom  of  the  tank  should  be  elevated  twenty  feet ;
for  fire  protection  the  tank  should  exceed  by
twenty  feet  the  height  of  the  buildings  it  is  in-
tended to  protect.    Pigs.  413  to  416.
In  a  cold  climate  the  tank
and   the   pipes  leading  to  it
should    be  thoroughly    frost-
prcKif.     This  is  accomplished
by  placing  a  flat  roof  over  the
top  of  the  tank  and  surmount-
ing that  with  a  conical  roof,
the  BpacL*   between  the    two
covering  forming  a  dead-air
spafij.    The  joists  supporting
the  bottom  of  the  tank  should
then  be  ceiled  and  boxed  in,
and   the    space    between   the
ceiling  and  the
bottom  of  the
tank  filled  with
mineral  wool  or
other  frost-
proof  material.
