142 
RAISING 38-TON GUN FROM MUD, 
Fig. 3. 
The digging was completed for the two platforms, PP, on the 24th, 
Friday, 25 th May. (3rd day of operations.) 
The platforms, PP, were each constructed of— 
1st layer: 4 planks, deal, 10' x 1' 4" x 3", at intervals of 2" apart, 
parallel to axis of gun. 
2nd layer: 4 planks, oak, 6' x 12" x 3", at intervals of 10", perpen¬ 
dicular to axis. 
3rd layer : 3 skids, fir, 6' x 12" x 12", touching, parallel to axis. 
This gave a base of 60 sq. ft. per platform, with the minimum of 
timber. 
Fig. 4. 
Plan of platforms, PP. 
