Abstract
The thermal emf and the magnetoresistance of liquid selenium were measured with graphite electrodes in a pressure vessel up to 1300K. A sign change of the thermoelectric power was observed at about 990K. Above this temperature selenium is an n-type semiconductor. A relatively high magnetoresistance was measured above 990K. Experiments for measuring the Hall effect with graphite electrodes up to 870K failed. Considering the results of the experiments a model for the conduction mechanism could be suggested.