22 KANSAS ACADEMY OF SCIENCE. 



rately. A measured volume is made alkaline, and distilled; the distillate is then 

 nesslerized: this gives the ammonia. For nitric acid an additional volume is meas- 

 ured into the flask, and the ammonia boiled off. The residual liquid is made slightly 

 acid by H CI, reduced by the copper-zinc couple, made alkaline, distilled, and ness- 

 lerized. The ammonia now obtained is that resalting from the reduction of nitrates 

 and nitrites. 



In Table I is shown, by months, the results for the three years ending February 

 28th, 1889. The columns under nitrogen give the nitrogen in both ammonia and 

 nitric acid. Ammonia is given as NH3; nitric acid as HNO,. 



In Table II are given some of the extreme — both greatest and least — propor- 

 tions between the rain-water and the compounds under consideration. 



