26 MAY 1933, Page 18

Worst of all, tarred roads are destructive to the life

of the streams and little rivers. If the tar is of the kind that is soluble in water, the rain-wash from them slowly destroys, not only the trout and grayling, but also the little water flies and beetles upon which the smaller members of the Salmonidae fatten. After a long spell of hot weather the streams run very low. Suddenly comes a thunderstorm, accompanied by heavy rain, and the water mixed with soluble tar rushes swiftly off the roads and causes serious destruction.