Am^e°cu:*i8P7h7?rm- }      Percolating  and  Filtering  Stand,  589 
odor.  It  would  not  mix  with  turpentine  spirits  in  any  proportion,  but 
when  shaken  would  give  an  opalescent  mixture,  and  soon  separate.  It 
would  burn  readily,  but  without  the  dense  smoke  that  the  pure  oil 
gives.  On  agitating  with  water,  three-fourths  of  the  oil  remained 
mixed  with  the  water,  while  one-fourth  appeared  at  the  top.  This 
layer  of  oil  floating  at  the  top  gave  all  the  indications  of  being  oil  of 
origanum,  mixed  readily  with  spirits  of  turpentine,  etc. 
From  the  specific  gravity,  color  of  flame,  etc.,  the  writer  concluded 
the  mixture  to  be  one-fourth  oil  of  origanum  and  three-fourths  alcohol. 
ON  A  PERCOLATING  AND  FILTERING  STAND. 
By  Joseph  P.  Remington. 
Most  pharmacists  are  compelled  to  be  economical  of  the  space  in 
their  pharmacies  which  has  been  set  apart  for  manipulations.  They 
require  the  greatest  amount  of  room  for  the  show-cases  for  displaying 
their  wares  and  for  the  accommodation  of  the  dispensing  counter  and 
its  accessories  ;  this  is  particularly  the  case  in  large  cities  and  towns, 
where  property  is  relatively  high  in  price,  when  it  becomes  an  expensive 
luxury  to  possess  a  well-appointed  laboratory,  distinct  and  separate  from 
the  store,  where  all  strictly  chemical  and  pharmaceutical  processes  may 
be  conducted  out  of  sight  of  the  customers  and  free  from  the  interruptions 
that  become  so  harrassing,  and  which,  without  great  care,  are  apt  to 
interfere  so  materially  with  the  thorough  performance  of  these  duties. 
He  who  possesses  plenty  of  room,  however,  and  can  extend  at  will 
his  facilities  for  manufacturing  has  a  great  advantage,  in  this  respect, 
over  his  less  fortunate  neighbor. 
The  writer  has  used,  with  a  great  deal  of  satisfaction,  for  the  last 
four  years  a  percolating  stand,  which  is  particularly  adapted  for  the  use 
of  the  pharmacist  who  has  frequent  demands  for  varying  quantities  of 
numerous  galenical  preparations,  and  who  either  makes  them  himself, 
or  prefers  to  have  all  of  the  operations  go  on  immediately  under  his 
own  supervision.  This  stand  was  contrived  with  the  view  of  accom- 
modating vessels  of  different  sizes  and  shapes,  and  the  excellent  wood- 
cut which  accompanies  this  description  will  almost  make  comment 
unnecessary.  It  may  be  useful,  however,  to  give  the  dimensions  and 
some  explanations. 
Three  upright  strips  (a\  four  and  a  half  feet  long,  one  and  a  half 
