Abstract: A lamp comprising an arc envelope and an end structure coupled to the arc envelope, and wherein the end structure comprises at least one opening adapted to support an arc electrode and to receive a dosing material into the arc envelope.

Abstract: An apparatus such as a crucible furnace for heating a vessel such as a crucible comprises an enclosure surrounding the vessel so that a flow path exists between the enclosure and the vessel which has an outer surface forming the inner boundary of the flow path. The flow path extends all around the vessel. First and second gas fired burners open into the flow path to discharge their hot combustion product gases into the path. Associated with each burner is a respective heat regenerator. When the first burner is in firing mode its emitted hot combustion product gases circulate around the flow path and leave through the second burner, which is in flueing mode, and heat the associated regenerator. Then when the second burner is in firing mode that heated regenerator heats the combustion air used by the second burner.

Abstract: There is disclosed a suction operated body fluid collection bottle having cylindrical portion terminating in a dome-shaped portion. An opening is positioned centrally with respect to said dome. The sides of the opening are arranged to accept a screw cap closure. The said closure has an upwardly standing nipple arranged to be attached to a suction conduit line and a second nipple arranged to be attached to a conduit terminating at the other end at a source of body fluids. The arrangement of the bottle is designed to aspirate the body fluids into the container without permitting the fluids to actually reach the suction line. In another embodiment the aperture has an insert container which extends downwardly into the container. The insert container is calibrated to receive accurately measurable, small quantities of body fluid collected within both the bottle and the insert. Such insert includes overflow means whereby quantities in excess of a predetermined amount can overflow into the interior of the bottle.