Supplement  to 
March  10,  1904.  JOURNAL  OF  HORTICULTURE  AND  COTTAGE  GARDENER.  215 
EVELYN. 
LORD  CIIAS.  BERESl'DRD. 
watering  the  leafage 
and  other  parts  with 
the  finest  possible 
film  of  the  mixture ; 
then  there  is  no  clan¬ 
ger  of  injury  to 
stock  or  poultry  in 
orchards. 
Paris  green  may 
be  mixed  with  Bor¬ 
deaux  mixture,  thus 
combining  a  biting 
insect  desti'oyer  with 
a  fungicide,  but  both 
articles  are  liable  to 
injure  Poach  trees, 
and  Bordeaux  mix¬ 
ture,  even  dilute,  is 
apt  to  injure  the 
tender  foliage  of 
Apple  and  Pear  trees. 
Paris  green  is  not 
suitable  for  mixing 
with  soap  or  paraffin 
washes,  or  with  liver 
of  sulphur  (sulphide 
rf  potassium)  solu¬ 
tion. 
London  Purile 
is  an  arsenito  of  lime 
obtained  as  a  bye- 
product  in  the  manu¬ 
facture  of  aniline 
dyes,  or  a  waste 
material  from  dye 
works.  Its  composi¬ 
tion  is  variable,  as 
seen  from  the  sub¬ 
joined  analyses:  1. 
Arsenic  43.65,  rose 
aniline  12.46,  lime 
21.82,  insoluble  resi¬ 
due  14.57,  iron  oxide 
1.16,  water  2.27  per  cent. ;  2.  Arsenic  43.65,  lime  26.23,  sulphuric 
acici  0.22,  carbonic  acid  0.27,  moisture  5.29  per  cent. 
It  is  a  finer  powder  than  Paris  green,  therefore  remains  longer 
in  .siLspension  in  water,  hut  is  more  liable  to  injure  foliage 
than  is  Paris  gieen,  as  the  arsenic  is  often  in  a  more  soluble 
form.  It  may  be  used  in  the  same  way  as  Paris  green,  either 
in  powder  form  or  in  water  suspension,  hut  is  not  ejnite  so 
reliable  ;  indeed,  Paris  green  is  to  be  recommended  for  general 
use.  In  the  case  of  London  purple,  freshly  burned  slaked  lime 
should  he  used  as  advised  for  Paris  green,  and  if  allowed  to 
stand  an  hour  all  the  soluble  arsenic  is  more  likely  to  be 
rendered  insoluble  than  if  ii.sed  at  once,  d'ho  strength  should 
not  exceed  loz  of  London  purple  to  12^  gallons  of  water,  and 
for  use  on  tender  foliage  loz  Tjondon  purple  and  2oz  slaked  lime 
to  twenty  gallons  of  water.  London  purple  should  not  he  msed 
on  Peach  trees.  It  may  he  added  to  Bordeaux  mixture,  and 
then  the  treatment  with  lime  is  not  necessary. 
Arsenate  of  Lead  is  a  prepared  article  made  liy  combining, 
approximately,  three,  parts  of  arsenate  of  soda  with  seven  parts 
of  acetate  of  lead  (Marlatt).  The  arsenate,  a  fine  white 
piowder,  remains  easily  in  suspension  in  water.  This  substance 
has  been  used  successfully  by  the  Ala.ssachii setts  Gypsy  Aloth 
Commission  for  the  de.striiction  of  caterpillars  at  the  rate  of 
lib  of  the  arsenate  of  lead  to  15  gallons  of  water,  half  a  jiint 
of  treacle  being  added  to  cause  the  insecticide  to  adhere  longer 
to  the  leaves.  Its  chief  advantage  lies  in  the  fact  that  it  can 
he  .applied  in  heavy  do.ses  to  tender  foliage  without  injury. 
A iithorities,  however,  differ  as  to  the  proper  way  of  ju-eparing 
arsenate  of  lead.  Cousins*  gives  the  proportions  as  loz  of 
pure  arsenate  of  soda  and  2oz  of  white  acetate  of  lead,  and 
prepares  the  liquid  with  16  gallons  of  water  and  llh  of  treacle. 
The  arsenate  of  soda  is  dissolved  in  a  little  hot  toi'  cold)  water, 
and  the  solution  poured  into  16  gallons  of  soft  or  rain  water. 
Then  the  acetate  of  lead  is  dis.solved  in  some  more  water,  and 
this  solution  ])oured  into  the  16  gallons  of  solution  of  arsenate* 
of  soda,  and  21h  of  treacle  added  to  the  litpiid  to  mak<i  it  stick 
to  the  foliage.  It  is  better,  however,  to  supplenu'nt  the  lead 
arsenate  with  a  petroleum  (‘innlsion,  2lh  to  the  16  .gallons  of 
1  quid,  and  thus  grapple  with  sucking  insects,  such  as  aphides 
and  mites  (red  s|)i(h‘r),  as  w(‘ll  as  biting  i)ests.  This  wash  is 
Iiarmless  to  foliage  and  effectiv('  on  caterpillars  in  a  young  state, 
hut  not  .so  when  the  pests  have  reaclu'd  a  half-grown  size*. 
Farly  treatment,  therefore,  is  all-im])ortant,  alike  to  i)revent 
damage  to  the  plants,  hiislu's,  or  trees,  or  to  effect  the  annihila¬ 
tion  of  tin*  P'-i-sts.  The' lead  aix'iiate  solution  is  equallv  effective 
on  slngwornis  or  sawfly  larva*  as  in  tin*  cat(*rpillar  of  moth;;. 
Experience.  (To  he  continued.) 
•  The  Chemist IV  of  the  Garden."  Macmillan  and  Co.,  London. 
Kelway’s  Delphiniums. 
.lAMES  KELVV.VY. 
Kvluivj  ((•  Eon 
THE  SHAH. 
Sutton’s  White  Cloud  Stock. — Among  spring-flowering 
single  Stocks  this  one  should  have  a  place.  The  tree  growth, 
large  flowers,  and  delicious  fragrance  of  the  dwarf  plants 
(height  2ft)  have  caused  it  to  receive  marked  attention  at  the 
Reading  experimental  grounds  of  Sutton  and  Sons.  A  photo¬ 
graphic  representation  of  a  liorder  covered  with  it  appears  on 
another  page. 
Four  Choice  Delphiniums.  It  would  be  entirely  supereroga¬ 
tory,  and  unnecessary,  to  labour  out  testimonials  in  iavour  of 
Delphiniums,  and  taking  it  as  a  foregone  conclusion  that  every¬ 
body  agrees  that  they  are  unsurpas.sed  for  garden  ornamenta¬ 
tion,  it  will  only  be  necessary  in  this  place  to  describe  the 
varieties  named  in  Messrs.  Kelway’s  illustration  given  above. 
These  are  four  in  number,  namely,  James  Kelway,  a  very  deep 
velvety  violet-blue  variety,  with  a  large  and  showy  white  centre. 
It  has'had  a  first-class  ceiTiflcate.  Secondly,  there  is  Evelyn,  with 
semi-double,  deep  blue  flowers,  tipped  violet  with  black  eye. 
F.C.C.  R.II.S.  'riiirdly.  The  Shah,  deep  blue,  veined  with 
purple,  having  a  white  eye,  and  is  semi-double.  A.M.  R.H.S. 
Lastly,  Lord  Charles  Beresford,  a  single, ,  sky-blue  in  coloui-, 
and  having  a  white  eye. 
Kelway’s  New  Tree  P.eonies. — One  of  the  great  features  of 
Westonbirt,  as  our  observatiojis  in  another  column  will  serve 
to  emphasise,  is  its  huge  Tree  Preonies;  and  if  our  recommenda¬ 
tion  were  acted  on,  there  would  be  far  more  Moutan  Pseonies 
in  the  kept-grounds  of  private  ])olicies  ere  this  spring  goes 
past.  Placed  in  a  sheltered  nook  or  position,  and  partially 
protected  from  frosts,  dainpn(*ss,'  and  cutting  winds.  espi*cia1ly 
cold  ground  winds  in  springtime,  when  new  and  tender  growths 
are  starting,  there  is  no  reason  why  these  exquisitely  la'autitul 
flowering  plants  should  not  flourish  everywhere.  Messr.s.  Kelway 
and  Son,  of  Langport,  as  we  all  know,  have  done  pioneer  work 
of  a  painstaking  natuia*  tO'  improve  these  Pieonics,  and  their 
yearly  exhibits  at  the  Temple,  Drill  Hall,  and  Holland  House 
Shows  are  well  known  to  the  majority  of  horticulturists.  They 
have  succec'ded  in  making  Pieonies,  both  singles  and  doubles, 
ailmired  and  grown  to  an  enoinious  extent  compared  with  a 
few  years  ago"  and  so  far  has  enthusiasm  ri.sen  in  the  I'nited 
States  that  "there  is  actually  a  Pseonia  Association  ther**. 
Hundreds,  perhaiis  thousands,  of  IVonies  go  from  Langport  to 
America,  <*s|)(‘cialiy  to  the  Northern  States.  I  his  plant  is 
most  excellent,  too,  for  gentle  forcing,  and  rooks  placed  in  large 
lints  now  can  be  had  in  flower  during  Aiiril  for  the  conservatoi  y. 
It  is  a  pleasure  to  have  .so  good  an  illustration  at  our  use  as 
that  on  the  opposite  page,  which  should  do  more  to  commend 
the  Tree  Paionies  for  nsr^  in  the.  grass  (or  shrubberies)  than 
any  notice  that  we  ciui  give.  In  their  '  Manual'’  this  year 
they  make  mention  of  a  “new  race’’  of  vhite  varieties. 
