Rights which cannot be acquired by prescription

Rights which cannot be acquired by prescripti~a.-Easements acquired under section 15 are said to be acquired by prescription, and are called prescriptive rights. None of the folbom~ing rights can be so acquired :--

1. (a) a right which would tend to the total destruction of the subject of the right, or the property on which, if the acquisition were made, liability would be imposed ;
2. (b) a right to the free passage of light or air to an open space of ground ;
3. (c) a right to surface water not flowing in a stream and not permanently collected in a pool, tank or oherwise ;
4. (d) a right to underground water not passing in a defined channel.