The briquet forming apparatus of the present invention is basically comprised of a pair of opposed and generally cylindrical forming roll assemblies that each have their co-operating exterior surfaces configured in a novel manner. The virtual partitions are mapped to physical databases of a database. The paired first support members are rigidly connected by second support members which extend between adjacent sloped-tube segments. The shoulder surface of the pin is provided at an end face of the pin. The receiving device processes the signal and its memory to start a presentation on the device. To this end, the alkaline earth metal oxide added is CaO, and the added amount of CaO is 1.