The yield per man on the working faces was 4.5 tons, and for the whole of the working force underground, o 846 tons, which is not less than that realized in shallower mines.
She waited, her breathing growing shallower and faster.
In the shallower tropical waters, especially on the central ridge, considerable areas are covered by Pteropod ooze, a deposit consisting largely of the shells of pelagic molluscs.
In depths beyond the reach of wave motion, and apart from suspension across a submarine gully, which will sooner or later result in a rupture of the cable, the most frequent cause of interruption is seismic or other shifting of the ocean bed, while in shallower waters and near the shore the dragging of anchors or 40 fishing trawls has been mostly responsible.
His breathing grew shallower.