132 
Abstracts  from  the  French  Journals. 
and  the  mixture  well  agitated,  until  the  lead  salt  is  decomposed, 
when  the  aqueous  liquid  is  removed,  the  ethereal  solution  washed 
until  free  from  acidity  and  then  diluted  to  200  cc.  by  addition  of 
pure  ether;  50cc.of  this  solution  are  freed  from  ether,  50  cc.  alcohol 
added  and  titrated  with  ^  NaOH;  1  cc.  NaOH  —  0  282  gram 
oleic  acid.  To  determine  the  iodine  absorption  a  quantity  of  the 
ethereal  solution  equal  to  0-5  gm.  oleic  acid  is  evaporated  at  500  C. 
in  a  current  of  CO:,,  and  50  cc.  Hubl's  reagent  are  added ;  after 
standing  for  12  hours  in  the  dark,  35  cc.  of  a  10  per  cent,  potassium 
iodide  solution  are  added,  the  mixture  diluted  to  250  cc.  with  water, 
15  cc.  chloroform  added  and  then  titrated  with  sodium  thiosul- 
phate.  At  the  same  time  50  cc.  Hubl's  reagent  must  be  titrated 
with  the  thiosulphate  ;  the  difference  between  the  two  titrations 
gives  the  iodine  absorbed  by  the  fluid  fatty  acid  taken  and  by  calcu- 
lating to  100  grams  of  the  fluid  acid  the  iodine  absorption  is  found. 
Pure  lard  yields  54  per  cent,  of  liquid  acid,  with  an  iodineabsorption 
of  94.  Pure  cotton-seed  oil  gives  approximately  70  per  cent,  of  liquid 
acid  with  an  iodineabsorption  of  136.  The  method  of  calculation  is  as 
follows,  A  representing  the  iodine  absorption  of  the  sample,  and 
B  the  percentage  of  oleic  acid  found  : 
Soluble  Saccharate  of  Iron. — Athenstsedt's  process  is  given 
as  follows  in  the  Moniteur  Scientifique ,  Nov.,  1889:  A  1  to  100 
solution  of  a  ferric  salt  is  precipitated  by  an  equally  strong  solution 
of  ammonia  or  a  fixed  alkali,  taking  care  to  operate  at  a  tempera- 
of  about  10°  C,  and,  in  all  cases,  below  150  C.  The  precipitate 
must  be  washed  rapidly  in  the  dark  and  with  distilled  water 
having  a  temperature  between  10°  and  150  C.  The  ferric  hydrate 
is  then  mixed  with  powdered  sugar  in  a  quantity  so  regulated  that 
the  dry  preparation  will  contain  3  parts  of  metallic  iron  to  100 
parts  of  sugar.  The  mixture  of  hydrated  iron  and  sugar  is  main- 
tained at  the  boiling  point  until  the  iron  becomes  dissolved  in  the 
syrup.  The  dry  product  is  obtained  by  drying  in  vacuo  at  a  low 
temperature.    This  saccharate  of  iron  may  be  kept  in  a  solution 
A  -  94 
42 
X      =  percentage  of  adulteration. 
ABSTRACTS  FROM  THE  FRENCH  JOURNALS. 
Translated  for  The  American  Journal  of  Pharmacy. 
