Am.  Jour.  Pharm.  ) 
October,  1909.  *  j 
New  Essential  Oils. 
493 
market.  He  also  gives  in  detail  his  method  for  determining  the 
amount  of  oil  present  and  the  diastatic  value  of  the  extract. 
The  Comparative  Examination  of  the  Halogen  Absorption  of 
Oils  by  the  Methods  of  Hubl,  Wijs,  Hanus,  and 
McIlheney. 
By  J.  S.  Remington  and  H.  Lancaster. 
In  determining  the  halogen  absorption  of  linseed,  lard,  and  rape 
oil,  by  the  above  methods,  the  authors  arrive  at  some  interesting 
conclusions.  They  find  that  better  results  can  be  obtained  by  the 
Wijs  than  by  the  Hubl  or  Hanus  methods.  More  concordant  results 
are  obtained  in  the  dark  than  in  the  light  with  the  Wijs  and  Hanus 
methods.  They  also  state  that  the  bromine  process  of  McIlheney  is 
practically  instantaneous,  and  because  of  its  rapidity  and  inexpen- 
siveness  is  preferable  to  any  of  the  iodine  methods. 
This  concluded  the  reading  of  papers.  Mr.  Peck,  on  behalf  of 
the  Cambridge  Pharmaceutical  Association,  invited  the  Conference 
to  meet  next  year  at  Cambridge.  The  invitation  was  accepted. 
Election  of  officers  was  then  proceeded  with  and  resulted  as  follows : 
President,  F.  Ransom,  Ph.C,  F.C.S.  (Hitchin)  ;  Hon.  Treasurer, 
J.  C.  Ummey  (London)  ;  Hon.  General  Secretaries,  E.  S.  Peck 
(Cambridge)  and  H.  Finnemore  (London). 
NEW  ESSENTIAL  OILS.* 
Oil  from  Barosma  Pulchellum. — In  addition  to  the  varieties 
of  Barosma  which  are  of  interest  in  the  preparation  of  buchu  leaf 
oil,  i.e.,  Barosma  betulinum  (Thumb.)  Bartl.  et  Wendl.,  B.  crenu- 
latum  (L.)  Hook.,  and  B.  serratifolium  (Curt.)  Willd.,  the  leaves 
of  other  species  have  lately  been  met  with  in  the  London  market  on 
several  occasions.  Some  years  ago,  Sage  1  reported  on  leaves  of 
Diosma  succulentum  var.  Bergianum,  known  as  Karoo  Buchu,  which 
are  reputed  to  yield  an  oil  equalling  that  of  Barosma  betulinum  in 
*  From  the  Semi-Annual  Report  of  Schimmel  &  Co.,  April,  1909. 
1  Chemist  and  Druggist,  65  (1904),  506,  717.    Report  April,  1905,  12. 
