Quarterly  Reports  of  the  Chemical  Committee , 1882.  249 
and  that  it  is  not  a pure  cake,  inasmuch  as  it  is  mixed  with 
carbonate  of  lime  and  sulphate  of  lime  (gypsum).  Altogether 
the  cake  contained  about  10  per  cent,  more  mineral  matter  than 
occurs  in  pure  undecorticated  cotton-cake. 
In  reply  to  the  usual  inquiries,  Mr.  Savidge  informed 
Dr.  Voelcker  on  February  27th,  that  he  bought  the  cotton-cake 
last  November,  from  an  agent  at  Banbury,  at  6Z.  5s.  per  ton, 
delivered  at  Chipping  Norton  Junction,  that  he  made  a claim 
of  4 1.  upon  the  two  tons  (which  has  been  allowed),  and  that  he 
would  endeavour  to  obtain  the  name  of  the  manufacturer  and 
further  particulars  as  soon  as  possible. 
June,  1882. 
Dr.  Voelcker  reported  the  following  cases  : — 
1.  Mr.  Henry  Cook,  Sussex  Farm,  Deepdale,  Lynn,  ordered 
40  to  50  tons  of  Black  Sea  rape-cake  at  51.  2s.  3d.  from  agents, 
who  bought  the  cake  from  manufacturers  in  Hull.  Each  cake, 
Mr.  Cook  informed  me,  had  “ pure  ” branded  on  one  side,  but  as 
he  did  not  like  the  appearance  of  the  cake,  he  sent  me  a sample 
for  analysis,  and  took  only  10  tons  of  it. 
The  following  is  the  composition  of  the  sample  sent  by 
Mr.  Cook : — 
Moisture 10*01 
•Organic  matter  66 '21 
Phosphate  of  lime  and  magnesia 4 • 24 
Alkaline  salts,  containing  phosphoric  acid  '66  2 • 96 
Insoluble  siliceous  matter  (sand) 16*58 
100*00 
* Containing  nitrogen 3*37 
Equal  to  ammonia  4*09 
Besides  rape,  the  cake  contained  apparently  a large  propor- 
tion of  small  weed  seeds,  the  siftings  of  oily  seeds,  and  dirt  and 
sand.  In  my  judgment  the  cake  was  very  dear  at  51.  2s.  6c?. 
per  ton,  for  I would  not  give  31.  3s.  for  it. 
2.  The  following  is  the  composition  of  a sample  of  Manure 
Rape-cake,  sent  to  me  by  Mr.  H.  Sheringham,  South  Creake, 
Fakenham,  Norfolk. 
Moisture 8*11 
•Organic  matter  52*14 
Phosphate  of  lime  and  magnesia 3*35 
Carbonate  of  lime 4*25 
Insoluble  siliceous  matter  32*15 
100*00 
• Containing  nitrogen 2*74 
Equal  to  ammonia 3 32 
