148 
RAISING 38-TON GUN FROM MUD. 
greater command was obtained over tlie columns of skidding by using 
two columns to eacli jack; tlius being able to throw the weight on the 
outer or inner side of the platform, according as one or the other sank 
Fig. 13. 
A B 
most, thus restoring the horizontal position without relaying the plat¬ 
form—which would have been impossible, when the weight was once 
taken, till the skids ZZ were placed under the gun. 
