368       Pennsylvania  Pharmaceutical  Association.  {ArAugusM9o™' 
stirring  should  be  continued  for  at  least  one  hour.  (5)  The  product 
should  be  stirred  thoroughly  until  cool.  (6)  After  the  volatile  flav- 
oring substances  are  added,  the  product  should  at  once  be  packed 
into  air-tight  containers. 
The  Manufacture  of  Perfumery  by  the  Pharmacist. 
I.  V.  S.  Stanislaus. 
A  review  of  various  commercial  methods  of  obtaining  floral  odors 
with  reference  to  the  synthetic  perfumes  constitutes  the  introductory 
part  of  this  paper.  The  difficulty  of  securing  good  high-grade  fusel 
oil  from  alcohol  was  noted.  Even  with  cologne  spirits  few  of  the 
commercial  samples  answered  the  requirements  of  the  perfume 
maker.  Ordinary  alcohol,  treated  with  two  ounces  of  animal  char- 
coal per  gallon  for  one  week,  and  then  filtered  through  talcum,  gives 
very  satisfactory  results.  A  formula  for  a  stock  solvent  called 
"  perfumers'  spirit  "  is  given. 
To  each  gallon  of  the  above  filtrate  add — 
Spirit  of  nitrous  ether  30  minims . 
Cumarin  20  grammes. 
Vanillin    .  ,  10  grammes. 
Oil  of  nutmeg  ,  30  minims. 
Tincture  of  benzoin,  Siam  1  ounce. 
After  which  follow  a  number  of  formulas  for  the  various  floral  and 
popular  odors,  all  of  which  are  possible  to  be  made  by  the  retail 
pharmacist  at  a  cost  of  between  six  and  eight  dollars  a  gallon,  with 
the  exception  of  extract  of  violet,  which  will  cost  about  twelve 
dollars  and  a  half  per  gallon. 
Liquor  Potassii  Arsenitis. 
E.  F.  Cook,  P.D. 
A  great  variation  having  been  observed  in  the  appearance  of 
samples  of  this  preparation  as  made  by  a  class  of  several  hundred 
students,  all  working  under  similar  conditions,  and  supposedly  fol- 
lowing similar  directions,  led  to  an  investigation  of  the  possible 
cause.  Some  preparations  were  observed  where  almost  entire  pre- 
cipitation of  the  coloring  matter  had  taken  place,  while  others  were 
perfectly  normal  in  appearance.  When  the  preparation  was  made 
according  to  the  U.  S.  P.  formula  by  strictly  following  the  official 
directions,  a  normal  preparation  was  obtained  which  possessed  the 
