Abstract
The variation with temperature of the electrical resistance of specimens of amorphous carbon and of Acheson graphite has been determined for temperatures between 0° c. and 900° c. The results obtained are compared with those recorded by other investigators. The work is to some extent complementary to that of Powell and Schofield, who determined the thermal and electrical conductivities of the same materials between 750° c. and 2500° c. Two samples of Acheson graphite showed minima of resistance at about 390° c. and 430° c. respectively.