The carbonization of certain cross‐linked polymers under carefully controlled conditions yields a nongraphitizing carbon which, on account of its high lustre and conchoidal fracture, has been called ``vitreous carbon''. The temperature coefficient of resistivity for this carbon has been determined and its bulk resistivity reconfirmed. These are compared to carbons formed from other bases, and it is shown that, although vitreous carbon has unique mechanical properties, its electrical characteristics are similar to a common form of processed carbon.