ERRATA. 
Table C, facing p. 220, sixth line from top, in column “Result , 1 "for “Penetrated plate, and about 
17" of wood,” read “Penetrated plate, and about 12" of wood.” 
Table A, at back of Table C, sixth line from bottom in column “ Plate or target , 1 "for “Scott 
Russell’s target,” read “Warrior Section.” 
