Betterment

Permanent improvement by one person of another's land, for which the common law gives the improver no compensation. Equity courts and statutes, following the Roman law, have modified this rule, securing to the bona fide holder of land, without title, the value of his betterments in on two shafts which inter- sect, the wheels become bevel wheels. The pitch surfaces are cones having a common apex at the in- tersection of the axes. The angles of the two cones depend on the ratio | whole respected by Mahommedans, though practically super- of the number of revolu- tions of each shaft and the angle between their axes. The line of contact of the pitch cones is the diagonal of a parallelo- gram whose adjacent sides represent in direction the angles of the axes, and in length the angular veloci- ties (or number of turns) of the respective shafts. Miter-gears are bevel- gears in which the shafts equal. The angle of each Chandler's Encyclopedia especially those of the begging friars. Manuscripts and BLOCK Books (q.v.).