80  The  Extracts  containing  Chlorophyll.  {^ff^SSf"' 
results  of  their  elaborate  researches,  alluded  to  the  wide  field  which 
they  embraced,  offering  various  interesting  points  for  discussion. 
Mr.  Prosjean  remarked  that  the  subject  was  certainly  a  large  one, 
and  already  sufficiently  bewildering,  so  that  he  must  protest  against 
the  use  of  some  of  the  names  which  the  authors  had  employed,  more 
especially  the  introduction  of  prepositions  into  them.  Some  of  the 
old  names  were  certainly  unwieidly  enough,  but  he  preferred  them  to 
such  terms  as  apomorphia,  in  which  there  was  nothing  to  signify  that 
it  was  derived  from  morphia  by  the  abstraction  of  water.  It  might 
equally  mean  that  anything  else  was  taken  away. 
Dr.  Wright  replied  that  the  title  was  first  employed  by  the  late 
Dr.  Matthiessen  to  signify  that  the  substance  was  a  derivative  from 
morphia,  and  that  it  had  now  become  a  conventional  term  to  signify 
the  abstraction  of  water,  and  was  certainly  less  a  misnomer  than  such 
names  as  oxygen. 
Mr.  Vernon  Harcourt  certainly  thought  that  there  was  no  reason 
for  the  introduction  of  prepositions  into  chemical  names  without  any 
consideration  of  the  fitness  of  the  term.  The  prefix  "  apo "  cer- 
tainly gave  no  indication  that  the  substance  was  a  derivative  formed 
by  the  abstraction  of  water. — Chem.  News,  Lond.,  Bee.  27,  1872. 
THE  EXTRACTS  CONTAINING  CHLOROPHYLL  * 
Br  J.  B.  Barnes. 
In  the  last  London  Pharmacopoeia  it  is  directed  that  the  extracts 
of  aconite,  belladonna,  hemlock,  henbane,  and  lettuce,  are  to  be  pre- 
pared by  evaporating  the  juice  of  the  leaves  unstrained  to  a  proper 
consistence. 
The  British  Pharmacopoeia  directs  the  juice  to  be  heated  to  130°  F. 
"*<  Separate  the  green  coloring  matter  upon  a  calico  filter ;  heat  the 
strained  liquor  to  200°  F.  to  coagulate  the  albumen,  and  again  filter ; 
evaporate  the  filtrate  by  means  of  a  water-bath  to  the  consistence  of 
thin  syrup ;  and  then  add  to  it  the  green  coloring  matter  previously 
separated,  and  stirring  the  whole  together  assiduously,  continue  the 
evaporation  at  a  temperature  not  exceeding  140°  F.,  until  the  extract 
is  of  a  proper  consistence." 
•  Read  at  the  Evening  Meeting  of  the  Pharmaceutical  Society  of  Great 
Britain,  December  4,  1872. 
