Changes

[[Image:bucket elev icon.png|right|80px]]

[[Image:persianWheel.jpg|thumb|right|200px|Persian wheel. Drawing: FAO]]

[[Image:noria.jpg|thumb|right|200px|Noria. Drawing: FAO]]

An improvement to the simple rope and bucket is to fit numerous small buckets around the periphery of an endless belt to form a continuous bucket elevator. The original version of this, which is ancient in origin but still widely used, was known as a "Persian wheel"; the earliest forms consisted of earthenware pots roped in a chain which is hung over a drive wheel. The water powered "noria", a water wheel with pots, buckets or hollow bamboo containers set around its rim, is similar in principle except the containers are physically attached to the drive wheel circumference rather than to an endless belt suspended from it.