$2 Appendices to Thirty-teventk Awmual Report 



for which this can scarcely ye* be said to be r h e c as* . i "ne folio wing is the 



In Classs A — 



Coal 



Tin nrviMMg 



Lead and 

 China clay worts 

 Stone 



In these adequate redu 

 suspension may be leg 

 purification. 



Wood palp paper 



Brewing 



Malting 

 Distilling 

 Tinpkting 

 Galvanising 

 Wire drawing 

 Shale-oil distiffing 

 Wool scouring 

 Tanning 

 Leather dressing 



Dairying 

 In Class B — 



In these dissolved 

 be removed. 



Waste 



r^per works (excepting paper from wood pulp) 

 Cotton dveing 

 Cotton printing 

 Woollen dyeing 



Woollen piece and yarn scouring with dye Iiqnor 



re all much 

 improved by 

 clarification. 



Sulphite ceHuloae 

 Gas and coke production 



The two last mentioned are in reality manufactures in which the waste 

 yet be satisfactorily treated, and are separated in the Com- 

 " because we are not aware of any method of so treating 

 them that the ef3nent3 could properly be discharged direct into streams.'* 

 The general standard recommended for sewage effluents corresponds 

 with that recommended for distillery wastes, viz. 3 parts suspended 

 solids and 2 parts dissolved oxygen absorption in 5 days. Tin. Lead, 

 and Zinc Mines, and Stone Quarries and Polishing Works are all classed 

 as requiring reduction to 6 parts suspended solids per 100,000, this being 

 regarded as sufficient to obviate danger to cattle or fish. Coal washings 

 are given as 4 parts per 100,000 of sohds. 



In the case of Jfcper Works the recommendation is 6 parts, as it is 

 abo in the case of Cotton Printing and Dyeing. In the case of Wool Dyeing 

 4 parts in 100,000 is recommended. 



The subject has received exhaustive treatment, not only as to the 

 actual polhitinms and their reduction, but as to the changes in the law 

 which are necessary to bang about the necessary reforms. For the con- 

 summation of the matter, what is requisite is the courage of application. 



With regard -•: tie matter :•: administration, it is prefer :c nc:ice 

 that both the Commission just referred to and the Salmon Fisheries Com- 



