40  Eldrin,  a  New  Plant  Constituent.      \ A™-  J°ur-  E!£g™1- 
'  1     January,  1921. 
and  yet  be  so  designed  as  to  be  denied  registration  in  another 
land. 
This  may  happen  when  the  trade-mark  is  so  composed  that  its 
units  are  not  intimately  blended.  A  citizen  of  the  foreign  country 
may  obtain  registration  for  himself  of  the  several  distinct  parts  of 
such  a  trade-mark  and  thus  prevent  the'  use  of  the  composite  trade- 
mark— except  upon  payment  of  blackmail  to  him. 
It  is  apparent,  therefore,  that  American  manufacturers  who 
wish  to  sell  their  goods  in  foreign  markets  need  something  more 
than  legal  protection  for  their  trade-marks.  They  require  the 
knowledge  and  services  of  a  competent  agency  to  make  a  study  of 
the  trade-mark  with  reference  to  its  fitness  for  general  use  in 
export  business  and  to  find  out  first  and  foremost  whether  or  not 
it  sufficiently  meets  the  requirements  for  ample  protection  in  this 
country.  The  practice  of  relying  upon  common-law  rights  is  robbed 
of  much  of  its  former  excuse  now  that  the  Patent  Office  has  opened 
the  door  to  registration  of  practically  all  "common-law"  marks. 
ABSTRACTED  AND  REPRINTED 
ARTICLES 
ELDRIN,  A  NEW  PLANT  CONSTITUENT* 
By  John  Uri  Lloyd,  Ph.M. 
cincinnati,  ohio. 
For  thirty  or  forty  years  in  the  experiments  I  have  made  with 
drugs,  plants  and  plant  structures,  I  have  met  continuously  the 
fact  that  linked  with  each  plant  texture  there  was  something  pres- 
ent that  under  the  influence 'of  an  alkali  gave  a  yellow  color.  For 
example,  strip  a  paw-paw  of  its  bark  and  touch  the  white  inner 
surface  with  a  solution  of  potash — now  it  turns  yellow.  There  is 
probably  one  rule  in  this  as  elsewhere,  and  that  is  the  rule  of  ex- 
ceptions. I  hope  to  find  one  white  blossom  that  will  not  turn 
yellow.  If  I  do,  the  exception  may  be  of  help  to  the  botanist,  for 
it  may  be  the  forerunner  of  a  class  distinction. 
*  Portion  of  an  address  on  Plant  Constituents  delivered  at  the  meeting 
of  the  Ohio  State  Eclectic  Medical  Assoc.,  May  18,  19,  20,  1920;  reprinted 
from  the  Eclectic  Medical  Journal,  Dec,  1920. 
