204 



Mr. Harry Grimshaw on 



Table II. 



Sewage a7id Wasie Water from Manufactories in various districts, 

 before a7id after treatmefit. Parts per 100,000 of Alb. Ammonia. 



Mode of Treatment. 



13 



Place, &c. 



Basic Iron. 

 Basic Iron. 

 Basic Iron. 

 Basic Iron. 

 Basic Iron. 

 Lime 



Basic Iron. 



.Sulphuric Acid 



Do. and Basic [ 

 Iron J 



Basic Iron 



Basic Iron. 



Irrigation. . 

 Basic Iron. 



Derby 



Burton 



Nuneaton 



Do 



Astley Bridge. .. 



Do. 

 f Astley Bridge [ 

 (^ Lime Elfluent J 

 /Wool Scourer's [ 

 \ Liquor J 



Do. 



^ Wool Scourer's 'I 

 "j Liquor treated !- 

 Iwith Vitriol ...) 

 fFelmonger's [ 



\^ Liquor J 



Hinckley 



Do 



No. 8, when treated with vitriol, yielded 8% of fatty matters, 0'4% of 

 vitriol being required. The bulk of the alb. matter is evidently contained in 

 the fatty material [See No. 8). 



No. 12. — The shaken sewage contained 275 of alb. amm. per 100,000. 



Table III. 



Seivage fro7n Hinckley., near Nuneaton. Process of irrigation only. 

 Results of test for Alb. Amm. Parts per 100,000. 



Crude sewage before settling... 

 „ „ after „ 



Efifiuent after irrigation 



„ „ precipitation with iron 



Sewage after settling 



Effluent after irrigation 



,, precipitated with iron salt A 



„ irrigation and iron salt 



Effluent after irrigation 



j> „ „ and iron salt... 



•65 



70% 



This is a bad sewage, but it will be seen that 39°/ of the 



