Am.  Jour.  Pharm.) 
April,  1920 J 
Current  Literature.  ^ 
269 
two  methods  are  useful:  namely,  Richmond  and  Hill's  method 
(cf.  Analyst,  43,  353,  1918),  and  the  Reichsgesundkeitsamt  method. 
According  to  the  latter  method  0.5  to  0.7  Gm.  of  the  sample  is  boiled 
for  two  hours  under  a  reflux  condenser  with  20  Cc.  of  20  per  cent, 
sulphuric  acid,  the  solution  then  cooled,  diluted,  rendered  alkaline 
with  sodium  hydroxide,  and  distilled,  the  ammonia  being  collected 
and  titrated  in  the  usual  way.  When  the  melting-point  of  a  sample 
of  commercial  saccharin  falls  below  220°  C,  it  is  advisable  to  esti- 
mate the  amount  of  f-sulphaminobenzoic  acid  present.  For  this 
purpose,  I  Gm.  of  the  sample  is  heated  for  two  hours  under  a  reflux 
condenser  with  10  Cc.  of  hydrochloric  acid  (sp.  gr.  1.124)  and  10  Cc. 
of  water;  the  solution  (filtered  if  necessary)  is  evaporated  to  dryness 
on  a  steam-bath,  the  residue  dissolved  in  10  Cc.  of  hot  water  and  the 
solution  kept  for  at  least  twelve  hours  at  a  temperature  below  10°  C. 
The  para  acid  separates  out  as  crystals,  which  are  collected,  washed 
with  a  small  quantity  of  cold  water,  dried  at  100°  C,  and  weighed. 
(From  The  Analyst,  December,  19 19.) 
EssBNTiAiv  Oiiv  FROM  Juntperus  procera  Grown  at  Nairobi. — 
A.  F.  Macculloch  (/.  Soc.  Chem.  Ind.,  38,  364-T,  1919). — The  oil 
obtained  by  steam  distillation  of  fine  shavings  of  the  wood  of  Junt- 
perus procera  grown  at  Nairobi,  British  East  Africa,  had  the  follow- 
ing characters:  Sp.  gr.  0.987  at  15.5°  C.  [a]j^,,  =  —16°,  = 
1.480.  The  oil  was  miscible  in  all  proportions  with  alcohol  of  90 
per  cent,  and  over,  soluble  (i  :  60)  in  70  per  cent,  alcohol.  The 
amount  of  cedrol  formed  depended  on  the  interval  between  the  dis- 
integration and  distillation  of  the  wood.  After  exposure  of  the  wood 
for  some  weeks  to  a  hot  sun  the  distilled  oil  solidified  to  a  mass  of 
crystals.  The  oil  obtained  by  distilHng  wood  which  had  not  been 
exposed  to  the  sun  after  disintegration  contained  38  per  cent,  of 
cedrol  (m.  p.,  75.5°  C).    (From  The  Analyst,  December,  1919.) 
Oiiv  FROM  Sumac  {Rhus  Glabra). —H.  W.  Brubaker  (/.  Ind.  Eng. 
Chem.,  II,  950,  1919). — The  seeds  separated  from  sumac  berries 
yielded  on  extraction  with  ether  11. 71  per  cent,  of  fatty  oil,  the 
average  characters  of  which  were  as  follows:  Sp.  gr.  at  15°  C, 
0.92577;  [njo^go  C.,  1. 4710;  acid  value,  0.9;  acetyl  value,  9.235; 
saponification  value,  192.6;  iodine  value,  126.76;  soluble  fatty  acids, 
0.766;  insoluble  fatty  acids,  93.54  per  cent.  The  characters  of  the 
insoluble  fatty  acids  were:    M.  p.,  17°  C;  solidifying  pt.,  6°  C; 
