AMERICAN  PHARMACEUTICAL  ASSOCIATION. 
507 
tion  of  woolens  from  moths  and  other  insects,  that  will  be  cheaper  and 
equally  effective. 
Accepted  by  G.  F.  H.  MarJcoe,  of  Boston,  Mass. 
Query  17th. — In  view  of  the  scarcity  and  high  price  of  Cardamoms, 
may  not  Asarum,  Canadense,  Canella  Alba,  Calamus  and  Ginger  be 
used  singly  or  combined  in  place  of  that  aromatic  in  some  officinal  prep- 
arations at  the  next  Revision  of  the  Pharmacopoeia. 
Accepted  by  Joseph  L.  Lemberger,  of  Lebanon,  Pa. 
Query  18th. — What  are  the  sources  of  Vinegar  made  and  sold  in  the 
United  States,  and  what  relation  in  quantity  and  quality  does  the  true 
cider  vinegar  produced  bear  to  that  from  other  sources. 
Accepted  by  P.  R.  Iloagland,  of  Boston. 
Query  19th. — What  is  the  actual  practical  power  of  the  Microscope  for 
detecting  impurities  in  commercial  powders  of  drugs? 
Accepted  by  Joseph  P.  Remington,  of  Brooklyn,  N.  Y. 
Query  20th. — Lycopodium  Clavatum  is  said  to  grow  in  this  country. 
To  what  extent  is  this  true,  and  may  the  lycopodium  sporules  be  collected 
from  it  for  the  supply  of  commerce  ? 
Accepted  by  Prof  J.  M.  Maisch,  of  Phila. 
Query  21st. — What  process  can  be  recommended  as  easy  of  execution 
and  affording  accurate  results  for  determining  the  percentage  of  crystal- 
lizable  alkaloids  in  cinchona  bark  ? 
Referred  to  Dr.  Samuel  P.  Duffield,  of  Detroit. 
Query  22d. — An  Essay  on  Abies  Canadensis  and  its  products  yielded 
to  medicine  and  the  arts. 
Accepted  by  William  Procter,  Jr.,  of  Phila. 
Query  23d. —On  the  present  sources  of  supply  and  the  statistics  of  the 
indigenous  drug  trade  of  the  United  States. 
Referred  to  Louis  C.  Diehl,  of  Louisville,  Ky. 
Query  24th. — Tapioca  is  largely  substituted  by  a  product  made  from 
other  feculas.  To  what  extent  is  this  imitation  practiced,  and  what  are 
the  natural  sources  of  the  fecula. 
Prof.  J.  Paris  Moore,  of  Baltimore. 
Query  25th. — Soluble  Pyrophosphate  of  Iron  in  scales  is  observed  to 
become  less  soluble  by  keeping.  What  is  the  cause  of  this  change,  and 
how  may  the  salt  be  obtained  of  constant  solubility. 
Accepted  by  G.  E.  Jeannot  of  Louisville,  Ky. 
Query  26th. — What  are  the  best  practical  tests  for  the  purity  of  Bro- 
mide of  Potassium. 
Accepted  by  J.  F.  Llewellyn,  of  Louisville.. 
Query  27th. — The  fusing  point  of  true  butter  of  Cacao  being  near  that 
of  the  temperature  of  the  body,  what  is  the  influence  of  such  additions 
as  wax,  tallow,  &c,  on  its  fusing  point,  and  to  what  extent  are  such  addi- 
