The  Wohurn  Pot- Culture  Experiments,  1908.  395 
influence.  But  it  is  clearly  brought  out  that  any  attempt  in 
the  direction  of  destroying  the  soil  acidity  by  the  use  of 
oxidising  materials  would  not  be  successful. 
6.  Experiments  on  the  Inoculation  of  Leguminous  Crops. 
(“  Nitro-hacterine  ”)• 
Together  with  the  field  experiments  conducted  in 
Stackyard  Field  (see  page  377)  there  were  others,  in  1908, 
carried  out  at  the  Pot-culture  Station.  The  crops  tried  were 
(1)  ordinary  white  clover,  (2)  mammoth  white  clover,  (3)  red 
clover,  (4)  lucerne.  The  appropriate  culture  material  (“  nitro- 
bacterine  ”))  for  each  crop  was  obtained  direct  from  Professor 
Bottomley,  and  was  used  strictly  in  accordance  with  his 
directions.  The  seed  was  sown  on  June  16,  1908.  There  was 
little  difference  to  be  noticed  between  the  inoculated  and  not- 
inoculated  sets,  but  on  the  weighings  being  taken  of  the  first 
cuttings,  these  yielded  in  green  produce  : — 
Ordinary  white  clover 
Mammoth  „ ,, 
Red  clover 
Lucerne 
Not  inoculated.  Inoculated. 
Grammes  Grammes 
. 211-6  237-1 
. 204-3  227-1 
. 211-0  215-6 
76-4  72-9 
There  was  thus  a slight  increase  in  most  cases  as  the  result  of 
the  inoculation,  but  this  was  too  small  to  allow  of  any  clear 
deductions  being  drawn,  in  view  especially  of  the  fact  that  the 
results  of  the  field  experiments  tended  rather  in  the  other 
direction.  The  experiments  will  be  repeated  in  1909. 
The  remainder  of  the  experimental  work  at  the  Pot-culture 
Station  in  1908  was  concerned  with  (1)  experiments  on  the 
influence  of  manganese  and  iron  sulphate  on  barley,  (2)  ex- 
periments on  the  influence  of  different  grasses  and  clovers 
when  sown  in  a corn  crop,  (3)  further  experiments  on  the 
manorial  value  of  sewage  sludge.  The  two  former  were,  for 
various  reasons,  failures  ; and  the  third,  which  was  conducted 
on  behalf  of  the  Royal  Commission  on  Sewage  Disposal,  is 
fully  dealt  with  in  the  Report  of  that  Commission. 
J.  Augustus  Voelcker. 
22  Tudor  Street,  E.C. 
