502  Fourth  Report  on  the  Analysis 
Mineral  matter  removed  from  an  acre  of  land  by  a crop  of  oats: — 
In  the  Grain. 
In  the  Straw 
and  Chaff. 
In  the 
whole  Crop. 
lbs. 
lbs. 
His. 
Silica 
27-2 
69-6 
96-8 
Phosphoric  Acid 
15-2 
7*1 
22-3 
Sulphuric  Acid  . 
1-1 
4-7 
5-8 
Lime 
2-2 
9-8 
12-0 
Magnesia  .... 
3-8 
5-3 
9-1 
Peroxide  of  Iron  . 
•6 
2-1 
2-7 
Potash 
9-2 
27-3 
36-5 
Soda 
•9 
2 7 
3-6 
Chloride  of  Potossium  . 
• • 
3-8 
3-8 
Chloride  of  Sodium 
•3 
6-0 
ft -3 
Total  . 
60-5 
138-4 
198-9 
The  reader  who  will  refer  to  the  first  report  on  ashes 
(Journal  of  the  Society,  vol.  vii.,  part  ii.)  will  find  that  the  ex- 
hausting character  of  oats  (if  indeed  exhaustion  is  connected  with 
mineral  composition  at  all)  is  but  little  different  from  that  of 
wheat. 
Barley. 
The  specimens  of  barley  were  grown  at  the  same  time  and 
under  the  same  circumstances  as  those  of  oats  just  described. 
The  varieties  were  the  Chevalier  and  the  Moldavian,  the  seed 
being  obtained,  as  in  the  other  case,  from  Messrs.  Gibbs. 
Chevalier  Barley. 
Per  centage  of  water  and  ash  in  three  specimens  of  Chevalier  Barley: — 
Water. 
No.  1.  The  seed 12-50 
No.  2.  Produce  on  clay  . . . 13 '20 
No.  3.  Produce  on  sand  . . . 13-20 
Composition  in  100  parts  of  the  ash  of  Chevalier  Barley  : — 
Silica  .... 
Phosphoric  Acid 
Sulphuric  Acid 
Carbonic  Acid  . 
I Lime  .... 
[ Magnesia 
Peroxide  of  Iron  . 
Potash  .... 
Soda  .... 
Chloride  of  Potassium 
i Chloride  of  Sodium 
Total 
No.  1. 
The  Seed. 
No.  2. 
Produce 
on  Clay. 
No.  3. 
Produce 
on  Sand. 
29-79 
22-25 
22-08 
25-32 
37-67 
38-26 
1-30 
2-82 
•92 
4-35 
none. 
none. 
3-62 
1-96 
2-97 
4-78 
10-00 
8-00 
1 -54 
•87 
•84 
26-83 
22-43 
24-97 
none. 
1*42 
•51 
none. 
none. 
none. 
2-47 
•56 
1-44 
100-00 
99-98 
99-99 
Ash. 
2-03 
2-30 
2- 15 
Ash  calculated 
on  drv  substance. 
••  2-32 
••  2-65 
• - 2-47 
