422 
MINUTES  OF  THE 
before  alluded  to,  was  prepared  by  a  steam-heating  process 
which  had  been  patented  in  this  country  by  Mr.  Grace,  and  lard 
is  or  was  made  by  it  in  New  York. 
Query  4th,  on  camphor  water,  was  now  read  by  Mr.  Markoe, 
was  accepted,  and  referred  for  publication.  The  paper  states 
that  the  camphor  water  of  the  U.  S.  Pharm.  is  four  times  as 
strong  as  that  of  the  British  authority. 
Queky  23d. — Mr.  Markoe,  having  been  unable  to  perform  the 
requisite  experiments  with  the  plants  as  to  their  insecticide 
powers,  requested  to  be  released  from  further  attention  to  the 
subject. 
The  Business  Committee  proposed  that  a  Committee  of  three 
be  appointed  by  the  Chair,  to  examine  the  specimens  and  instru- 
ments deposited  in  the  rooms  for  the  inspection  of  the  mem- 
bers, and  report  thereon  to  a  future  sitting. 
Messrs.  Stearns,  Markoe,  and  Stabler  were  appointed. 
Prof.  Parrish  exhibited  a  patent  hard  rubber  vacuum  filter, 
easily  operated,  intended  for  use  by  the  apothecary.  It  con- 
sists of  a  funnel,  a  diaphragm  and  neck,  with  a  collar  exter- 
nally, to  rest  on  the  mouth  of  the  jar  for  convenience;  the 
vacuum  is  created  by  a  hard  rubber  syringe  pump  attached  to 
the  filter  by  a  flexible  tube.  The  filter  was  tried  with  some 
cloudy  syrup  and  operated  with  considerable  facility. 
Dr.  Squibb  had  filtered  under  pressure,  and  found  it  to 
answer  well,  but  that  percolation  under  pressure  does  not  work 
well. 
Prof.  Parrish  considered  the  success  of  percolation  depended 
on  the  natural  process  of  capillary  attraction. 
Mr.  Colcord  had  percolated  under  a  pressure  of  40  lbs.  to  the 
square  inch,  and  at  all  temperatures,  from  near  the  freezing  point 
to  240°  F.,  and  he  thinks  the  principle  must  be  abandoned  after 
two  or  three  years'  trial. 
On  motion,  the  meeting  now  adjourned  to  four  o'clock,  this 
afternoon. 
Third  Session — Sept.  6th.  Wednesday. 
The  Association  convened  at  4  o'clock,  P.  M.  The  President 
in  the  chair. 
