35S  On  the  Power  of  Soils  to  absorb  Manure. 
2nd  Analysis — 
173*98  gave  9-03  = 1*743  or  1*0018 
1 st  Experiment  . . 1 *0040  per  Cent. 
2nd  ,,  . . 1*0018  ,, 
Mean  . . . 1 • 0029  , , 
It  would  be  hardly  possible  to  obtain  a solution  more  accurately 
representing  1 per  cent,  of  potash  than  the  above. 
Experiment  82. — Solution  of  nitrate  of  potash  (containing  1 per  cent, 
potash)  and  white  clay — 
Clay'0U  SK!  kla^1S  | Digested  for  24  hours,  with  occasional  agitation. 
1st  Analysis  of  the  resulting  Liquid — 
Grains. 
Platinum  Salt. 
Potash. 
Per  Cent. 
168-36 
gave 
6 28  = 
1*212 
or  *7061 
2nd  Analysis — 
150*42 
gave 
5*78 
1*116 
or  *7417 
1st  Analysis.  . . . *7661  per  Cent. 
2nd  ,,  ....  *7417  ,, 
Mean  . . . *7539  ,, 
100  grains  of  the  original  Solution  contained  . 1*0029  grains  of  Potash. 
100  grains  of  the  resulting  Liquid  contained  . *7539  ,,  ,, 
Loss  hy  each  100  grains  of  Solution  . . *2490  ,,  , , 
The  whole  loss  will  consequently  have  been  9*960,  which  has  been  ab- 
sorbed by  2000  grains  of  clay,  making  the  absorption  *4980  per  cent. 
With  a stronger  solution  of  the  nitrate  we  have  here  an  increased 
absorption.  A solution  of  free  or  caustic  potash  was  now  made 
to  compare  with  the  last — great  care  was  taken  that  the  solution 
should  be  free  from  carbonate,  which  might  have  deranged  the 
results,  and  for  this  purpose  the  sticks  of  potash  were  dissolved  in 
alcohol,  which  was  subsequently  distilled  off.  After  several 
trials  a solution  was  obtained  which  afforded  on  analyses  the 
following  results : — 
1st  Analysis — 
Grains. 
Platinum  Salt. 
Potash. 
Per  Cent. 
208*36 
gave  10*71  = 
2-067  or 
•9922 
2nd  Analysis — 
166*45 
gave  8*73  = 
1*685  or 
1*0121 
1st  Analysis  . . . *9922  per  Cent. 
2nd  ,,  ...  1*0124  ,, 
Mean  . . . 1*0023  ,, 
The  following  experiment  was  made  with  the  above  solution: 
Experiment  83. — Solution  of  Caustic  Potash  (of  1 per  cent.)  and  white 
clay. 
Clay 10n  2000  °raUIS  j Digested  in  the  cold  with  shaking  for  12  hours. 
