The present writer, in this report, has made clear up the relation between the pelletizing by continuous O. A. apparatus (See Fig. 2 and Fig. 3) and ash contents of coal, which is closely connected with wettability of coal. On this connection, he has reported in the other report (See Journal of the Mining and Metallurgical Institute of Japan, Vol. 97, No. 1123, p. 937).
