Quart. Fourn. Scr. Fuly, 1872. 
Plate II. 
I. 
MALLET’S 36-INcCH 
MORTAR, 
OF 42 TONS. 
Tried at Woolwich, 1857-8. 
Il. 
I2-INCH WROUGHT-IRON 
MUZZLE-LOADING 
GUN, 35 TONS. 
Rifling :—No. of grooves, 9; 
depth of groove, 02”; width, 1°5 
(i.e, same as 10-inch); twist, 
from 0 to I in 35 cals. 
III. 
KRUPP’S I1-INCH 
PRUSSIAN BREECH- 
y jij). LOADING GUN. 
Ze ae 
ZZ 
IV. 
13-INCH SEA-SERVICE 
MORTAR. 
Weight, 100 cwts. 
We 
68-POUNDER. 
95 cwts. 
VI. 
ARMSTRONG. 
7-INCH BREECH LOADER. 
