A.m.  Jour.Pharm.\ 
October,  1897.  / 
Camphor  Tree. 
favorable  conditions.  The  minimum  winter  temperature  should  not 
be  below  20°  F.,  and  this  minimum  should  be  of  rare  occurrence. 
The  soil,  preferably  sandy  and  well  drained,  should  be  irrigated 
unless  there  are  abundant  rains.  Fifty  inches  of  water  during  the 
warm  growing  season  is  desirable,  and  much  more  may  well  be  used 
where  the  air  is  very  dry. 
An  abundance  of  plant  food,  rich  in  nitrogen,  is  required  for  rapid 
growth  ;  but  the  kind  of  fertilizer  that  can  be  most  profitably  applied 
will  vary  according  to  the  character  of  the  soil  in  each  locality.  In 
the  absence  of  definite  information  in  this  regard,  the  kind  of  fertilizer 
producing  most  rapid  growth  of  wood  in  the  orange  or  in  other 
fruit  trees  may  be  taken  as  an  index. 
The  northern  boundary  of  the  dotted  area  on  the  accompanying 
map  {Fig.  2)  marks,  approximately,  the  limit  within  which  the  cam- 
phor tree  may  be  grown  in  situations  protected  by  buildings  or  by 
other  trees,  while  the  northern  limit  of  the  area  shaded  by  lines 
marks  the  approximate  boundary  of  the  area  within  which  it  may 
be  grown  without  protection.  Further  experiments  in  planting  the 
camphor  tree  will  doubtless  modify  both  of  these  lines  somewhat. 
It  is  hoped  that  by  continued  selection  of  seeds  from  the  most  hardy 
trees  plants  may  be  bred  up  to  endure  more  cold. 
PROPAGATION. 
Camphor  trees  may  be  grown  either  from  seed  or  from  cuttings. 
They  are  usually  grown  from  seed,  as  the  trees  fruit  abundantly,  and 
seedlings  can  be  grown  more  easily  than  cuttings.  The  seeds  are 
collected  at  maturity  in  October  and  November,  and,  after  drying, 
are  packed  in  sharp  white  sand  or  some  similar  material  to  keep 
them  fresh  until  the  time  of  planting  in  spring.  About  the  last  of 
March  they  are  sown  in  drills  in  the  seed  bed. 
The  soil  of  the  seed  bed  should  be  a  good  sandy  loam  mixed  with 
about  one-third  leaf  mould.  The  seed  bed  should  be  kept  moist, 
but  not  too  wet,  and  should  be  shaded  from  the  direct  rays  of  the 
sun  if  the  weather  is  warm.  The  best  soil  temperature  for  germi- 
nating camphor  seeds  is  from  700  to  75 0  F.  The  temperature  of 
the  atmosphere  may  be  10  degrees  higher.  The  seedlings  will 
grow  well  at  higher  temperatures,  but  are  likely  to  lack  vigor  and 
hardiness. 
The  seedlings  may  be  grown  in  pots,  which  will  facilitate  trans- 
