(1.) An easement is a right in the owner of one parcel of land to use the land of another for some special purpose; as where A, who owns land which does not reach to the public road, secures from B a right of way for a road across the land of B to the public road.
(2.) The land to which an easement is attached, in the above case, A's, is called the dominant tenement, and the land upon which the burden or servitude is laid, in this case B's, is called the servient tenement.
(3.) The principal easements are rights of way for roads, pipe lines (See Form No. 84), or telephone lines, the right to transact business upon land, the right to use a wall as a party wall (See Form No. 83), and the right to have the whole of a division fence maintained by a co-terminous owner. Co-terminous owners are mutually bound equally to maintain the division fences, boundaries and monuments between them, and any departure from the rule is properly the subject of an agreement.
(5.) A party wall is a wall built on the dividing line of the lands of two adjoining owners. Where a party wall rests partly upon the soil of each owner, and was constructed as a party wall, each owner is possessed in severalty of his own soil up to the dividing line, and of that portion of the wall which rests upon it, but the soil of each, with the wall belonging to him, is burdened with an easement or servitude in favor of the other, to the end that it may afford a support to the wall and building of such other. (See Form No. 83.)