LOFODEN  NORWEGIAN  COD-LIVER  OIL. 
147 
menters ;  but  he  considers  this  jalap  as  an  inferior  kind.  In 
concluding  his  essay,  M.  Andouard  says,  that  the  jalaps  of 
pharmacy  are  reduced  to  two, — the  tuberous  and  the  fusiform  ; 
the  Tampico  is  an  inferior  kind,  and  should  only  be  used  in  the 
state  of  resin  ;  and  that  it  is  necessary  for  the  pharmaceutist  to 
know  when  to  use  the  one  and  the  other. 
Pharmacologists  cannot  agree  as  to  the  plant  that  yields  this 
variety.  Guibourt  queried  whether  it  was  not  the  Ipomoea 
mestitlanica,  which,  according  Choisy,  is  a  Mexican  product, 
known  as  "  purga."    This  however  is  doubtful. 
The  majority  of  pharmaceutists,  I  am  persuaded,  will  not 
think  themselves  warranted,  but  will  decide  that  it  is  improper, 
to  substitute  in  any  preparation  the  Tampico  for  the  true  jalap, 
which  has  been  so  highly  esteemed  for  more  than  two  centuries, 
and  whose  efficacy  and  certainty  of  action  is  beyond  the  slightest 
doubt. 
40,  Aldersgate  Street,  E.C 
Lon.  Pliar m.  Jour.,  Dee.  1867, 
LOFODEN  NORWEGIAN  COD-LIVER  OIL- 
By  Robert  Howden. 
The  information  in  this  paper  relating  to  Lofoden  cod-liver  oil 
is  supplied  on  the  authority  of  four  gentlemen  in  Norway, — Cap- 
tain H.  Olsen,  of  the  Royal  Navy,  Commanding  Officer  of  the 
Government  Surveillance  at  Lofoden ;  Captain  Heyerdahl,  of 
the  Royal  Navy,  engaged  on  the  same  station  ;  Mr.  Moller,  a 
pharmaceutist,  of  Christiania,  who  has.  devoted  many  years  of  a 
long  life  to  the  subject,  and  Mr.  Sharp,  an  English  merchant  at 
Christiania.  To  the  latter  gentleman,  my  friend  Mr.  Sharp,  I 
am  under  particular  obligation,  for  he  not  only  translated  a 
series  of  questions  prepared  for  the  purpose  into  the  Norweigan 
language,  but  placed  himself  in  direct  communication  with  those 
gentlemen  whom  he  considered,  by  their  official  position  or  per- 
sonal experience,  able  to  supply  accurate  and  intelligent  informa- 
tion. He  further  translated  their  replies  into  English,  thereby 
furnishing  the  basis  of  the  present  communication. 
