JOURNAL 
OF  THE 
LOYAL  AGRICULTURAL  SOCIETY 
OF  ENGLAND. 
XV. — New  Determinations  of  Ammonia,  Chlorine,  and  Sulphuric 
Acid,  in  the  Rain-Water  collected  at  Rothamsted.  By  Sir  J.  B. 
Lawes,  Bart.,  LL.D.,  F.R.S. ; J.  H.  Gilbert,  Ph.D.,  LL.D., 
F.R.S. ; and  R.  WARINGTON. 
Introduction  313 
The  Ammonia  in  Rain  313 
1.  In  Daily  Rainfalls  314 
2.  In  Monthly  Rainfalls 319 
The  Chlorine  in  Rain  325 
The  Sulphuric  Acid  in  Rain  328 
Summary  of  Results 330 
In  a Report  recently  made  in  this  ‘Journal,’  “On  the  Amount 
and  Composition  of  the  Rain  and  Drainage- Waters  collected 
at  Rothamsted  ” (vol.  xvii.,  1881,  p.  241),  an  account  was 
given  of  various  investigations  on  the  composition  of  the  rain- 
water collected  in  the  large  rain  gauge  at  Rothamsted.  These 
investigations  embraced  determinations  of  ammonia  made 
at  Rothamsted  in  1853-4 ; determinations  of  ammonia  and 
nitric  acid  by  Professor  Way  in  the  rain  of  1855  and  1856  ; 
determinations  of  total  solid  matter,  hardness,  organic  carbon 
and  nitrogen,  ammonia,  nitric  acid,  and  chlorine,  made  by 
Dr.  Frankland  in  samples  of  rain  collected  in  1869-70 ; and 
lastly,  determinations  of  chlorine  made  at  Rothamsted  in 
1877-80.  We  have  now  to  give  a further  account  of  work 
carried  on  in  the  same  direction. 
The  Ammonia  in  Rain. 
It  will  be  recollected  that  a considerable  difference  was  shown 
to  exist  between  the  results  of  the  earlier  and  later  determina- 
tions of  ammonia.  The  earliest  Rothamsted  determinations, 
YOL.  XIX. — S.  S.  Y 
