266 Nitrification with reference to the Purification of Sewage. 



Table IX. — Experiments upon the Absorption of Ammonium Chloride 

 from Dilute Solution by Various Finely Divided Solids. 



No. 



Solid tested • 

 weight taken. 



Original solution of 

 NH 4 C1 added. 



Liquid after standing, 

 ammonia content per 

 100,000 parts. 



Ammonia in 

 blank control 

 in thousandths 

 of a milligramme. 



Volume 

 of liquid 



in c.c. 



Ammonia, 

 content 



per 

 100,000 

 parts. 



Upper 

 clear 

 liquid. 



Lower 

 turbid 

 liquid. 



Clear 

 liquid. 



Turbid 

 liquid. 



1 



BaS0 4 , 1 gramme ... 



100 



1 -oo 



1-02 



0-91 











2 





100 



5 -00 



4-30 



4-04 



2 







3 





50 



5-00 



4-14 



3-78 



3 







4 



Clinker, 2 grammes . . . 



50 



1 -00 



0-82 



0-89 



2 







5 





50 



1 -00 



0-75 



1 -03 



5 







6 



Sand, 2 „ 



50 



1 -00 



"83 



1 -05 



3 







7 







1 -oo 



0-85 



0-99 







In Experiments 4 — 7, 10 c.c. N/1 KHO was added before distilling off the ammonia. 



