590  Percolating  and  Filtering  Stand.      { AmbJe°cU,r'i87h7arm' 
inch  wide  and  three-quarters  of  an  inch  thick,  are  fastened  to  the  wall, 
as  shown,  two  feet  nine  inches  apart,  over  the  working  counter.  Six 
iron  japanned  brackets  (£),  15x9,  are  now  fastened  by  screws  to  the 
upright  strips,  three  of  them  in  the  same  plane,  the  top  of  the  bracket 
eighteen  inches  above  the  level  of  the  counter,  and  the  other  three  in 
the  same  plane ;  the  tops  of  these  twenty-two  inches  above  the  tops 
of  the  lower  set. 
The  longest  limbs  of  the  brackets  are  placed  horizontally,  and  are 
perforated  by  drilling  half-inch  holes,  one  inch  apart,  along  the  edge  of 
four  of  them  (the  outside  edge  is  preferred),  whilst  two  of  the  brackets 
(those  designed  for  the  middle  supports  (c)  should  have  holes  drilled  on 
both  edges.  Upon,  the  brackets  the  horizontal  strips  (d)  are  laid  ; 
these  should  be  of  black  walnut  or  other  hard  wood,  and  are  two  feet 
nine  inches  long,  one  inch  thick,  one  and  three-quarter  inches  wide  ; 
a  slot  half  inch  wide,  is  cut  into  each  of  these  horizontal  strips  through 
the  middle,  but  not  extending  quite  the  whole  length  5  the  strip  should 
be  left  solid  for  a  distance  of  three  inches  from  the  ends.  The  cross 
pieces  (e)  are  made  of  black  walnut  and  are  fifteen  inches  long,  two 
