160  Gleanings  from  the  German  Journals,  {^""x^iu^mi^' 
obtained  the  fat  by  exhausting  sheeps'  wool  with  ether.  The  fat  was 
saponified,  in  the  usual  way,  with  potassa  solution  and  table  salt ;  the 
mother-liquor  contained  no  glycerin.  The  soap  was  exhausted  with 
ether,  which  on  evaporation  left  70  per  ct.  fat ;  this  was  boiled  in  a. 
closed  vessel  with  alcoholic  solution  of  potassa,  and  then  exhausted, 
with  ether.  The  residue  left  on  evaporating  the  ether  Avas  repeatedly- 
recrystallized  from  spirit  of  ether  (1  ether  to  3  or  4  alcohol),  and  was 
then  pure  cholesterin. — Ibid.  458—455. 
Quiniometry. — Dr.  E.  A.  Van  der  Burg  criticizes  de  Vrij's  method 
of  determining  the  quantity  of  the  alkaloids  in  cinchona  bark,  and 
corroborates  his  own  results  obtained  in  1865.  He  proves  that  de  Vrij's 
improved  method*  yields  only  about  two- thirds  of  the  alkaloids  con. 
tained  in  the  bark  ;  that  the  balance  remains  mainly  in  the  bark,  and 
also  in  the  alkaline  liquor;  that  at  present  we  possess  no  method  for 
even  the  approximatel}^  correct  separation  of  the  cinchona  alkaloids; 
that  assays  giving  the  composition  of  cinchona  bark  to  the  thousandth 
per  cent,  of  the  different  alkaloids  are  unreliable,  and  that  the  main 
cause  for  the  varying  results  of  different  chemists  in  analyzing  the 
same  bark  must  be  looked  for  in  the  methods  followed  by  them. — 
Zeitschr.f.  Anal  Cliem.  1870,  ii,  179—203. 
As  a  remedy  for  diphtheria^  Dr.  Rothe,  of  Altenbnrg,  recommends 
the  following:  Acidi  carbolici,  alcoholis  aa  I'O,  tinct.  iodin.  0*5,  aquae 
dest.  5*0  m.  The  mixture  is  applied  three  times  daily  to  the  affected 
parts  of  the  throat,  and  the  removable  membrane  is  detached  wdth 
the  same  brush,  so  that  the  mixture  touches  the  mucous  membrane. 
The  patient  also  uses  a  gargle  of  water,  to  a  teacupful  of  which  from 
10  to  15  drops  of  the  mixture  is  added.  In  severe  cases  the  appli- 
cation is  renowned  every  three  or  two  hours,  if  possible,  also  during 
the  night.  Dr.  Rothe  relates  15  cases,  of  which  but  one  terminated 
fatally,  and  in  this  the  diagnosis  "  diptheritis"  was  doubtful. — iV 
Jahrh.  f.  Pharm.  1870,  Juli,  46,  from  Apothekerzeitung. 
Dialyzed  Oxide  of  Iron. — Berlandt  in  Bucharest  recommends  to 
inclose  solution  of  sesquichloride  and  oxide  of  iron  in  a  well  washed 
hog's  bladder,  the  opening  of  which  connects  with  an  open  glass  tube 
of  10  m.  m.  diameter ;  the  bladder  is  suspended  in  a  beaker  filled 
*10  grm.  powder  percolated  with  dilute  muriatic  acid,  to  obtain  150  c.  c,  . 
the  liquid  decomposed  with  NaO,  and  agitated  with  ether. 
