4-02  Ex tr actum  Gossypii  Radicis  Fluid.  {AmseJp^876arm" 
The  whole  arrangement,  when  finished,  is  saturated  with  hot  linseed 
oil  and  mounted  either  on  four  legs  or  fastened  at  a  distance  of  about 
8  inches  to  the  wall. 
To  give  an  illustration,  I  will  mention  that  the  rack  in  my  possession 
is  13  feet  long  and  has  12  openings  for  the  reception  of  vessels* 
The  inside  width  at  one  end  is  10J  inches,  at  the  other  4J  inches. 
I  can  insert  percolators  from  1  pint  to  10  gallons  capacity.  The 
latter  ones  (made  of  the  heaviest  kind  of  tinned  iron)  are  frequently 
charged  with  20  pounds  of  material  and  the  appertaining  menstruum,, 
and  yet  they  do  not  show  the  least  impression  from  their  triangular 
supports.  The  packing  of  the  percolators  is  to  be  done  before  putting 
them  into  the  rack. 
Finally,  I  recommend  the  adoption  of  the  principle  here  represented 
also  for  the  well  known  iron  filtering  stands,  thereby  greatly  increasing 
their  usefulness  without  materially  adding  to  their  cost.  Large  and 
even  the  smallest  funnels,  evaporating  dishes,  etc.,  could  be  equally 
well  placed  in  or  on  the  same  support.    Figures  4  and  5  show  the  de- 
tails. The  side  of  the  triangle  next  to  the  stand  is  provided  with  a 
ridge  "  a  "  of  such  a  shape  as  to  form  with  its  trestle  a  longitudinal 
notch  for  the  reception  of  those  pieces  of  different  widths  of  thin  sheet 
iron,  which  are  placed  across  the  triangle  to  adjust  the  opening  to  a  cer- 
tain given  vessel. 
EXTRACTUM  GOSSYPII  RADICIS  FLUIDUM. 
BY  WALTER  A.  TAYLOR,  PH.G. 
{Abstract  from  an  Inaugural  Essay.) 
The  supposed  emmenagogue  effects  of  the  cotton  root  appear  to- 
have  been  observed  among  the  colored  race  during  their  bondage  in 
the  South.  An  old  family  servant  of  our  family  extended  me,  after 
an  explanation  why  I  wished  to  know  (for  she  seemed  to  be  rather 
