Figure 16.  Metal Artifacts. a-a¹. fragment of 8-in. bronze spherical shell with fuse hole; b. bronze spherical cansiter or grape shot. c. bronze spherical canister shot; d. .70 cal. lead musket ball; e-f. .69 cal. lead musket ball; g-h. impacted lead musket ball; i. .48 cal. musket or pistol lead ball.