ERRATA. 



On page 1, 5th line, for u have&quot; read &quot;has.&quot; 



On page 8, 7th line from bottom, for &quot;a part&quot; read &quot;parts.&quot; 



On page 10, for the amount of potash in No. 12 A, for &quot;6.3368&quot; read 



0.3368.&quot; 



On page 48, 1st line, for &quot;stopped&quot; read &quot;stoped.&quot; 



