ABoCtobe^m3nn'}    British  Pharmaceutical  Conference.  481 
that  accompany  this  paper  were  drawn  by  the  author  and  will  be 
of  great  value  to  those  whose  work  is  analytical  in  character,  par- 
ticularly in  food  stuffs.  The  increasing  use  of  the  soya  bean  will 
undoubtedly  lead  to  its  adulteration  with  ground  meal. 
Some  Factors  in  Thyroid  Pharmacy. 
By  R.  Glode  Guyer. 
Observations  on  the  thyroid  glands  obtained  from  Scotland 
were  made  by  the  author.  He  found  that  the  weight  varied  con- 
siderably. The  influence  of  the  age  of  the  sheep  and  class  of 
breed  was  also  taken  into  account,  and  the  author  states  that 
the  ratio  of  dried  to  moist  substance  is  1  to  3.6.  He  also  thinks 
too  much  stress  is  laid"  on  the  iodine  content  and  that  on  this 
point  much  more  work  is  necessary. 
Further  Report  on  Iodine  Content  of  Thyroid  Gland. 
By  N.  H.  Martin. 
The  author  submits  a  tabulation  of  a  series  of  determinations 
of  the  iodine  content  of  thyroid  glands  obtained  from  a  certain 
district  as  compared  to  some  from  same  district  last  year.  He 
maintains  that  a  strength  of  0.25  per  cent,  would  not  be  too  high 
for  supplies  of  the  gland  from  this  district. 
Extract  of  Male  Fern. — Analytical  Notes. 
By  C.  A.  Hill. 
The  best  safeguard  against  the  adulteration  of  extract  of  male 
fern,  the  author  states,  is  an  assay  process  for  rTlicic  acid,  with 
chemical  and  physical  constants  of  the  genuine  product.  A  con- 
tent of  22  per  cent,  of  the  filicic  acid,  or  filicin,  he  would  regard 
as  not  too  high  for  a  genuine  extract. 
An  Examination  of  the  Essential  Oil  of  Witch  Hazel. 
By  H.  A.  D.  Jowett  and  F.  L.  Pyman. 
The  writers  give  considerable  data  of  an  experimental  nature  of 
work  done  in  connection  with  the  oil  from  Hamamelis  virginiana. 
Their  results  agree  pretty  closely  with  those  of  Scoville,  whose 
conclusion  was  that  the  oil  consists  chiefly  of  a  terpene. 
