very unique and highly desirable refinished and rewired early 20th century vintage industrial adjustable arm freestanding floor lamp complete with a green enameled parabola-shaped reflector. central to the factory lamp is the sectional ball and socket cast iron "knuckle" joint, which remains completely intact and in excellent working condition. patented by otis c. white in 1893, the versatile joint received many awards and medals (e.g., franklin institute, of philadelphia, the massachusetts charitable mechanics association, of boston, etc.) for its remarkable originality, both in design and execution. the cast bronze and iron wrist joint contains lightly incised manufacturer markings. the yellow brass paddle switch or key socket has been rewired with period appropriate rayon lamp cord. fabricated by the otis c. white company, worcester, mass. the articulating arm moves up and down a solid steel pole supported by a heavy weighted cast iron base.