THE ROYAL ARTILLERY INSTITUTION. 
233 
Steel plates § in. thick, laid hori¬ 
zontal, so as to slightly overlap; size, 
2 ft. 6 in. by 2 ft. 8 in.; weight, 1 cwt. 
21 lbs., being about 20 lbs. to the 
superficial foot. 
The next mantelet tried was of 
steel, backed with hide, thicker than 
the last; the Enfield rifle being used 
at a range of 150 yds. 
No. 1 shot made no impression on the mantelet. 
Moved up to 50 yds. range. 
No. 1 shot made no impression on the mantelet. 
Moved up to 25 yds. range. 
No. 1 shot made not the least impression on the mantelet. 
Enfield Rifle. 
Weight of bullet.. 530 grs. 
Charge.. 2J drs. 
MusJcet rifled, pattern 1842. 
Weight of bullet. 848 grs. 
Charge.... 3 drs. 
(Signed) 
G. Eraser, Captain, E.A. 
