Looking the other way, showing the trap point to prevent runaways fouling the junction.
This wood is in great part already dead substance, but the mycelium gradually invades the vessels occupied with the transmission of water up the trunk, cuts off the current, and so kills the tree; in other cases such Fungi attack the roots, and so induce rot and starvation of oxygen, resulting in fouling.
The fouling of the air that results from the steam-engine, owing to the production of carbonic acid gas and of sulphurous fumes and aqueous vapour, is well known, and its use is now practically abandoned for underground working.
The fuze was lighted and the crew of six were pushing off in their little motor skiff when the propellor was torn off by fouling the submarine, and they had to take to the oars.
The rapidity with which walls, piles and pontoons - stone, wood and iron - become covered with marine plants is well known, while the discovery of some effective means of preventing the fouling of the bottoms of ships by the growth of algae would be hailed as a boon by shipowners.