1906.] 



Nitrification of Sewage. 



71 



o 

 o 



CD 



o~ 



O 



•is -09a 



CC 



i 



uo 



o 



CO 



p 



it: 



CO 



c* 



>o 



CO 



as 



o 



5-844 

 2-219 



3*157 



o-io 

 o-io 



Nil 

 0-25 



n "09a 







a 



CO 



« 



ci 

 oo 



r— 



§ 

 p 



s 



© 



5-800 

 1-800 



2-634 



0-39 

 0-025 

 0-06 

 0-5 



'2 *99a 



j2 



rH 

 U0 



-* 



ec 



X 



CM 



OC 



C 

 rH 



■p 



o 



OO 



00 



o 



6-20 



1-970 



1-700 



0-25 

 0-47 



o-oii 



0-03 

 0-75 



•21 'aoji 



*01 *AO^[ 



CO 



CD 



0C 



CO 



CO 



OC 

 CC 



c 



CM 

 CN 



o 



CI 

 00 



o 



4-657 



1-782 



1-407 



Nil 

 95 

 0-014 

 0-014 

 0-5 



c 

 c 



CC 



If 



U0 

 00 



oc 



5 



CO CC 



8 2 



00 CO 



H/l ■* 

 rH 00 



oo o 



5-157 

 1-813 



1-875 



Nil 



0-029 



0-04 



0-5 



*S -AO^J 



"9S # *>0 





« 



c 



27-4 

 9-6 

 1-904 

 0-724 



4-500 

 1-234 



1-667 



Nil 



0-018 

 0-062 

 0-5 



00 oo 



Oi U5 

 Oi CO 



34-2 



31-6 



11-2 

 2-350 

 1-532 



5-300 



2-00 



2-967 

 Nil 



0-03 

 -007 

 0-5 



'61 "PO 



187-9 



74-8 



37-8 



37-0 



11-8 

 2-240 

 0-916 



5-813 



2-188 



2-000 

 Nil 



0-02 

 0-051 

 0-5 



•81 -l^O 



UO OJ 



uo oo 



uo uo 



23-8 



29-4 



12-4 

 2-180 

 0-592 



4-234 



1-800 



1-634 

 Nil 



0-09 



0-129 



0-5 



•6 '^PO 



239-2 

 133-0 



35-8 



97-2 



11-2 

 2-544 

 1-704 



6-667 

 2-434 



2-034 



Nil 



0-09 



0-114 



0-25 



'IS - *<feS 



' 



1 



1 



1 



10-2 

 2-880 

 1-068 



4-867 

 2-220 



2-867 



Nil 



0-5 



•51 -^d9S 



'P 9 

 t- co 



22-0 



21-0 



10-8 

 2-220 

 0-850 



4-834 

 1-734 



Nil 



0-007 

 0-007 

 1-0 



•2 *^9S 



156-4 

 43-8 



012-0 

 959-1 

 8-11 

 8-5S 

 5-81 



3-900 

 1-667 



Nil 



0-018 

 Nil 

 0-5 



•18 'Sny 



167-0 

 66-2 



33-0 

 33-2 

 12-4 

 1-668 



0-844 



4-034 

 1-700 



Nil 



0-03 

 Nil 

 0-75 



•^S "Sny 



-* 



3 



19-0 



27-0 



13-6 

 1-666 

 1-030 



4-736 

 1 -613 



Nil 



0-04 

 Nil 

 0-75 



"OS £\n£ 



c 



T 



x 

 1 



1 



I 



' 



1 



c 



OC 



X 



CN 



« 



2 



p 



rH 



5-564 

 1-626 



Nil 



0-022 



Nil 



0-75 



•81 A n r 

 '9 A^f 



1 



1 



cn 



CC 



CO 



eg 



00 



<M 



00 



o 



4-840 



Nil 

 0-022 

 Nil 

 0-5 



oc 



1 



1 



1 



cq 



ec 



•<* 



CM 



00 



o 



3*400 



Nil 



0-5 



U0 



o 



1 



c 



a 



.2 



ft 



CC 

 03 



.2 

 ! 3 



o 



02 



P 



b 

 s. 

 C 



| 





CC 



p 



C 



1 



et 



a 



1 



s 



1 

 I 



; 5 



Oxygen absorbed in 

 4 hours at 80° F. 



Oxygen absorbed in 

 3 mins. before incu- 

 bation at 80° F. 



Oxygen absorbed in 

 3 mins. after incuba- 

 tion (3 days) at 80° F. 



Nitric nitrogen on day 

 of collection 



Nitric nitrogen day 

 after collection 



Nitrous nitrogen on 

 day of collection 



Nitrous nitrogen day 

 after collection 



Column necessary to 

 obscure test lines 

 (inches) 



