578 
Progress  in  Pharmacy. 
i  Am.  Jour.  Pharm. 
i   December,  1903. 
At  the  end  of  this  time  the  normal  air  pressure  is  restored,  by  the 
introduction  into  the  glass  receptacles  of  sufficient  ether  vapor. 
After  standing  twenty-four  hours  longer  it  is  found  that  the  yeast 
has  been  largely  converted  into  a  thick  liquid  ;  this  is  separated  by 
filtration  and  is  subsequently  concentrated  to  a  thick  extract  in  a 
vacuum  apparatus. 
Wuk. — This  is  prepared  by  introducing  purified  and  washed 
yeast  into  an  equal  volume  of  water  at  from  60  to  yo°  C. 
The  degree  of  temperature  is  important;  it  must  be  low  enough  to 
prevent  the  coagulation  of  the  contained  albumin  and  high  enough 
to  cause  the  yeast  cells  to  burst  and  allow  the  escape  of  the  con- 
tained liquid.  The  resulting  liquid,  after  being  filtered,  is  concen- 
trated in  vacuum  apparatus.    (Phar.  Centralh.,  1903.) 
Of  the  meetings  and  congresses  not  previously  noticed  in  the  pages 
of  this  journal,  the  "  Vers  amm  lung  der  Deutschen  Natutforscher  und 
Aerzte"  held  in  Kassel  from  the  2 1st  to  the  25th  of  September, 
deserves  more  than  passing  notice. 
The  meeting  this  year  was  somewhat  in  the  nature  of  a  jubilee 
meeting.  All  of  the  section  meetings  were  well  attended,  a  total  of 
more  than  two  thousand  members  and  visitors  being  present. 
Among  the  subjects  that  were  brought  before  the  section  of  Phar- 
macy and  Pharmacognosy  were  :  Studies  in  the  Menthol  Series,  by  E. 
Beckmann,  Leipzig,  who,  in  an  exhaustive  paper,  reviewed  the  chem 
istry  of  menthol,  its  derivatives  and  its  isomers. 
On  the  Constituents  of  Kava-Kava  Root,  P.  Siedler,  Berlin, 
whose  investigations  appear  to  corroborate  the  claims  made  by  Lewin, 
Lavialle  and  others;  Siedler  believes  that  the  medicinally  active 
ingredient  of  kava-kava  is  the  resin. 
The  Constitution  of  Myristicin  and  its  Occurrence  in  French 
Oil  of  Parsley. — H.  Thorns,  Berlin,  has  found  that  myristicin,  a 
phenol  ether,  first  isolated  by  Semmler  in  1890,  from  oil  of  mace, 
replaces  to  a  very  large  degree  the  apiol,  in  oil  of  parsley  of  French 
origin. 
The  Quantitative  Estimation  of  Free  Phosphorus. — J.  Katz, 
Leipzig,  describes  and  recommends  a  modification  of  Straub's  oxyda- 
tion  method  of  separating  phosphorus  as  phosphoric  acid. 
At  the  second  and  final  general  session,  Professor  Behring,  Mar- 
burg, read  a  communication  on  the  "  Prophylaxis  of  Tuberculosis" 
that  has  created  considerable  thought  and  comment.    In  this  com- 
