Not until the late 1600's did the method of letting the powder blast ignite the fuze become general.
The ends of the match were crossed into a sort of rosette at the head of the fuze.
The next shell contained twenty-three pounds of Maximite, and the fuze was timed to go off a little quicker.
If the fuze had to be withdrawn, there was a fuze extractor for the job.
It had a single hole where the powder was funneled in—full, but not enough to pack too tightly when the fuze was driven in.
Over this ring the top of the fuze case was marked in seconds.
In later years, however, such projections were replaced by two "ears," little recesses beside the fuze hole.
Their efficacy is in their recoil and the "graze" fuze they use.
It consists of a stop-cock A, which, in connection with a tube, is introduced between the fuze and the charge.
The action of this fuze will be readily understood from the plan of the fuze at Fig. 16.