Aju.  .Tour.  Pharm. ) 
August,  1883.  J 
Practical  Notes. 
401 
September,  is  evaporated  at  a  low  heat  to  a  pilular  consistence.  U.  S. 
— The  root  and  herb,  collected  in  spring  and  dried,  1  part,  is  exhausted 
by  maceration  with  water,  the  infusion  evaporated  to  2  parts,  diluted 
with  cold  water,  filtered  and  evaporated  to  a  thick  extract.    P.  G. 
PRACTICAL  NOTES  FROM  VARIOUS  SOURCES. 
By  the  Editor. 
Essential  Oils  and  Distilled  Waters. — Percy  Wells  recommends  the 
addition  of  a  small  quantity  of  potassium  permanganate  to  the  water 
sufficient  to  make  it  a  faint  pink  color,  and  states  that  volatile  oils  as 
well  as  medicated  waters  are  thereby  much  improved  in  odor  and 
quality.  Even  waters  partly  spoiled  will,  on  being  redistilled  in  this 
manner,  recover  their  odor  and  not  again  change,  h  to  1  grain  per 
ounce  of  oil  will  be  sufficient. — Phar.  Jour,  and  Trans.,  May  12, 
1883,  p.  918. 
Temperature  of  Ice  Cream. — In  a  paper  read  before  the  Pennsylva- 
nia Pharmaceutical  Association  Mr.  Gustavus  Pile  explains  the  fact 
that  the  seeming  warmth  of  ice  water  as  compared  wdtli  ice  cream  is 
due  to  the  considerable  difference  of  temperature,  that  of  ice  cream 
being  about  12°F.,  and  if  frozen  good  and  hard,  even  as  low  as  8°F., 
while  it  is  difficult  to  get  the  ice  water  even  as  low  as  the  freezing 
point. 
Chinoline  and  Chloral. — On  mixing  the  two  liquids  O.  Rhousso- 
poulos  obtained  a  white  insoluble  butyraceous  mass  which  could  not 
be  recrystallized.  But  on  mixing  the  etherial  solutions  of  the  two 
compounds  only  very  little  of  this  mass  is  formed,  while  the  filtrate, 
on  evaporation,  will  yield  white  crystals  which  melt  at  66 °C.,  are 
decomposed  by  hot  water,  but  may  be  recrystallized  from  benzol, 
and  have  the  composition  C^iH^oNOaClg  representing  one  molecule 
each  of  chloral,  chinoline  and  water. — Berichte,  1883,  p.  881. 
Chinoline  and  Phenols. — K.  Hock  observed  a  rather  considerable 
rise  of  temperature  to  take  place  on  mixing  chinoline  and  phenol;  the 
liquid  remained  transparent,  bnt  the  author  was  unable  lo  obtain  a 
well-defined  definite  compound.  By  combining  with  the  aid  of  heat 
2  molecules  of  chinoline  with  1  mol.  of  resorcin  a  crystalline  mass  of 
chinoline-resorcin  C24H20N2O2  is  obtained,  which  may  be  recrystallized, 
is  readily  soluble  in  alcohol,  ether  and  chloroform,  insoluble  in  benzin, 
sparingly  soluble  in  cold  water  and  has  a  bitter  somewhat  acrid  taste. 
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