Journal . , mfm^4 I admit that fish life may be possible even in pre-sence of a chemical effluent when diluted by thenatural water of the stream into which it discharges ;but something more than this is required. You musttake into account the cumulative effect of sewageor a chemical discharge for long periods. Then, again,other trades on the same stream should be con-sidered, especially those requirii gcom| aratively purewater. A chemical discharge on the upper reai bi ola stream is often as unjust to other trades lowerdown as it is to the public in destroying fish life,etc. Pollution by trade
Journal . , mfm^4 I admit that fish life may be possible even in pre-sence of a chemical effluent when diluted by thenatural water of the stream into which it discharges ;but something more than this is required. You musttake into account the cumulative effect of sewageor a chemical discharge for long periods. Then, again,other trades on the same stream should be con-sidered, especially those requirii gcom| aratively purewater. A chemical discharge on the upper reai bi ola stream is often as unjust to other trades lowerdown as it is to the public in destroying fish life,etc. Pollution by trade liquids takes two forms, or thatin suspension and solution. We may also divide tradeliquids another way, or those which are worthlessfrom those which contain a waste product of more orless value, if we could but succeed in recoveiing the former class the purification method shouldbe of a simple automatic nature, rs the cost of work-ing, however slight it may be. means so much extra cost on the manu
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
