Elkington showed that by cutting a deep drain through the clay, aided when necessary by wells or auger holes, the subjacent bed of sand or gravel in which a body of water is pent up by the clay, as in a vessel, might be tapped and the water conveyed harmlessly in the covered drain to the nearest ditch or stream.
In the case of the Neuadd dam this difficulty was met by deliberately omitting the mortar in transverse joints at regular intervals near the top of the dam, except just at their faces, where it of course cracks harmlessly, and by filling the rest with asphalt.
Exfoliation gently, effectively, and harmlessly removes the top layer of skin, allowing its natural radiance to shine through.
He thus finds that this sum should be either as great as 1 66, so that blowholes shall be absent; or as low as o 28, so that they shall be harmlessly deep-seated.
Similarly a man who committed a murder twenty years ago and has since lived peaceably and harmlessly in society seems less guilty and his action more due to the law of inevitability, to someone who considers his action after twenty years have elapsed than to one who examined it the day after it was committed.