20 
Analysis  of  Malt  Extract. 
?  Am.  Jour.  Pharm- 
1        Jan.,  1885. 
directly  into  the  apparatus.  Using  a  tube  of  200  millimeters,  each 
degree  to  the  left  indicates  0*998  per  cent,  of  gum.  If  the  gum  is  to 
be  determined  in  a  different  way,  the  lead  precipitate  should  be  decom- 
posed, in  the  usual  manner,  by  HgS,  the  gum  be  transformed  into 
grape-sugar  by  the  use  of  acid,  and  the  sugar  be  determined  with  cop- 
per solution.  Or,  the  solution  freed  from  lead,  is  again  precipitated 
with  basic  acetate  of  lead,  filtered,  the  residue  dried,  weighed  and 
burned,  and  then  the  oxide  of  lead  deducted. 
Deter inination  of  the  Maltose. — The  filtrate  from  the  precipitate  with 
lead  acetate  may  be  directly  polarized;  for  a  tube  of  200  millimeters 
each  degree  to  the  right  indicates  maltose  equal  to  0*364  per  cent,  of 
the  solution.  Or  sufficient  sulphuric  acid  is  added  to  the  filtrate,  until 
the  free  acid  amounts  to  2  per  cent.,  and  heat  is  applied  for  six  hours, 
when  the  maltose  will  be  converted  into  glucose,  the  latter  being  deter- 
mined by  Fchliug's  solution,  lOCcm.  of  which  indicate  0*07  Gm.  of 
maltose. 
From  248  analyses  the  mean  composition  of  2  to  4  minutes  malt 
extract,  calculated  for  100  parts  of  dry  substance,  has  been  determined 
as  follows : 
Maltose   69-270 
(Jinn   23-800 
tSoluhle  albumen   3  826 
Insoluble  albnmen   1-405 
Lactic  acid   1*085 
Ash..:   1-614 
100-000 
Sirop  de  Dentition  (Delabarre). — Among  my  notes  I  find  the 
following  improvement,  credited  to  Hager  (?) : 
Olvcerini   ^i 
Chloroformi   gtts.  x 
Tinct.  croci  hispan.  (1:8)   ,^ss 
M  ell  is   ^ss 
M. 
Thi«  formula  is  more  likely  to  relieve  the  itching  of  the  gums  than 
the  original.  Spanish  saffi'on,  by  the  way,  is  credited  with  possessing 
anodyne  (calming)  properties. 
The  best  way  to  exhibit  the  syrup  would  be  to  apply  it  to  the  gums 
by  smearing,  and  slightly  rubbing  them. 
Hans  M.  Wilder. 
[Hairer,  in  "  Phar.  Praxis,"  i,  p.  957,  gives  the  following  formula :  Tinct. 
croci  7-5.  Tinct.  ipecaouanhfe  PO,  Syr.  rhei  50-0,  Syr.  liquiritise  50*0  gm. 
Some  add  a  little  vanilla.  (See,  also,  "Am.  Jour.  Phar.,"  December,  1884, 
]).  614.1— Editor  Am.  Jour.  Phar.] 
