It grows in marshes, ditches, pools and drains in meadows, and sometimes obstructs the flow of water with its dense matted roots.
A large sand bar obstructs the entrance to the river, which is not quite 1 m.
The river bar obstructs navigation, the depth not exceeding 14 ft., so that large vessels must lie outside.
The interest of the landlord always coincides with the general interest: whatever promotes or obstructs the one has the same effect on the other.
They pass more readily through mucous membranes, but almost every one of these is provided not only with a coating of mucus, which obstructs their passage, but with some reflex mechanism which tends to remove them.