Am.  Jour.  Pharm. ) 
Sept.,  1876.  j 
Adjustable  Support  for  Funnels. 
401 
give  the  triangular  space  the  required  size  by  interposing  quadrangular 
staves  between  the  top  pieces,  across  the  rack,  as  shown  in  Fig.  3. 
In  order  to  enable  the  reader  to  construct  this  rack  for  himself,  I  sug- 
gest as  the  shortest  way,  to  make  first  a  drawing  of  natural  size  in  the 
style  of  Fig.  I.  Pin  several  sheets  of  packing  paper  on  a  counter,  one 
in  continuance  of  the  other  and  of  the  desired  length  of  the  rack.  Draw 
A  B  and  C  D,  and  construct  a  basis  for  operation  line,  O  P,  in  the  mid- 
dle between  A  B  and  C  D.  Next,  make  a  pattern  of  pasteboard  or 
wood,  representing  an  equilateral  triangle.  This  is  done  by  drawing 
on  the  material  to  be  used  a  circle  of  about  9  inches  radius,  carrying 
the  latter  as  a  cord  around  the  periphery  six  times,  thus  marking  out 
six  points,  three  of  which  (every  second  one)  are  connected  by  straight 
lines.  The  thus  formed  equilateral  triangle  is  cut  out  as  a  pattern,  one 
side  of  which  is  divided  by  a  lead  pencil  mark  into  two  halves.  This 
marked  side  represents  the  "  base  "  of  the  triangle,  and  the  angle  op- 
posite may  be  termed  the  "  point."  Lay  the  pattern  on  the  drawing, 
point  and  mark  covering  line  O  P.  The  point  standing  about  two 
inehes  from  O,  draw  the  angle  of  crosspiece  1,  touching  the  internal 
sides  of  A  B  and  C  D.  Draw,  next,  the  short  lines  S  S  across  A  B  and 
C  D,  and  the  first  crosspiece  is  finished.  Take,  now,  a  pair  of  com- 
passes and  describe  from  line  O  P  the  largest  possible  circle  between 
the  inner  sides  of  A  B  and  B  D,  and  inside  of  angle  1.  This  done, 
draw  line  X  X  at  right  angle  with  O  P.  7Vo  inches  from  this  line, 
X,  place  again  the  point  of  the  pattern  as  before,  draw  the  angle  of 
crosspiece  2,  then  lines  S  S,  the  circle  of  proper  size,  and  so  on  as  de- 
scribed, till  all  the  crosspieces  are  located  as  shown  in  the  sketch.  The 
exact  size  of  all  the  parts  as  well  as  their  location  being  now  given,  it  is 
the  carpenter's  work  to  execute  the  whole  arrangement  out  of  wood. 
The  material  is  pine  wood. 
The  crosspieces  are  about 
three-fourths  of  an  inch 
thick  and  fastened  on  A  B 
and  C  D  by  means  of 
screws.  There  are,  further, 
a  number  of  staves  to  be 
made  as  long  as  the  distance 
of  B  to  D,  and  from  1  to  2 
inches  broad,  for  the  interposition  between  the  crosspieces,   Fig.  3. 
26 
