ashingtott Items.

We copy from the Evening Star of the 18th : TEBBIBI.E EXPLOSION- AT THK ABSBBAX—TEE HBB

EI M.ED—A EtTUBBB HISSIEO.

This afternoon, a terrific explosion was heard in the direction of the arsenal, shaking buildings in tbe very heart of the city ; and soon it was ascertained that the explosion had taken place in a small building, about twenty by forty feet to the left of the main walk and