Abstract: A therapeutic lamp for biostimulation with polarized light, which comprises a light source with a power substantially between 30W and 300W, a reflector with a rotational paraboloid light reflecting surface arranged behind the light source so that the focal point substantially coincides with the point source, a polarizer arranged in the path to generate polarized output light which has a cross-section of at least 100 cm.sup.2. The lamp further comprises a first tube with a first axis coinciding with axis of rotation of the paraboloid surface, the reflector with the light source is fixed in the first tube so that a sealed connection is provided therebetween, a second tube with a second axis which closes an angle between 110.degree. and 120.degree. with the first axis, the tubes have substantially equal and circular cross-sections and are attached to each other to form an integral housing.

Abstract: Due to the inclination of a centrifuge arm of a centrifugal casting arrangement the mass of a muffle or retort and a compensation or balancing mass come to lie essentially in the same rotational plane. The infinite adjustment of a muffle or retort holder and the compensation or balancing mass is accomplished by a drive rod movably arranged within the centrifuge arm as well as by a gear rack driven by the drive rod and upon which there is seated the muffle holder. A housing structure containing a cover member prevents access to the centrifugal casting arrangement during operation of the centrifugal casting machine.