G6 
The effect of sewage contamination lias lately shown itself very 
remarkably in Belfast Lough, where, for a stretch of several miles 
the shore has become absolutely fetid — so fetid as to be distinctly 
perceptible in passing along it by rail. This has resulted from the 
stimulant action of the sewage on the growth of a common green 
sea- weed (Ulva). The weed has increased in quantity enormously, 
decomposing banks of it lining the sides of the Lough, and evolving 
sulphuretted hydrogen and other unwholesome gases. It appears, 
indeed, that the adjoining country is from this cause becoming to 
some extent derelict, so far as the well-to-do classes are concerned, 
well-to-do classes, I mean, not of fishes, but of humanity, for, of 
the effect upon fishes I have no information. 
