"Oh, yes, you can!" declared Tom, who had inspected the plant. "I'll show you how."
"Why, we haven't a mould big enough for the central core," was another objection.
"Then we'll make one," declared Tom. "We'll dig a pit in the earth, and after it is properly lined we can make the cast there."
"I never thought of that!" exclaimed the manager. "Perhaps it can be done."
"Of course it can!" cried Tom. "Do you think you can shrink on the jackets, and rifle the central tube?"
"Oh, yes, we can do that. The initial cast was what stumped me. But we'll go ahead now."
"And you can wind the breech with wire, and braze it on; can't you?" persisted Tom.
"Yes, I think so. Are you going to have a wire-wound gun?"
"That, in combination with a steel-jacketed one. I'm going to take no chances with 'Swiftite'!" laughed Tom, for so he had named his new explosive, in honor of his father, who had helped him with the formula.
"It must be mighty powerful," exclaimed the manager.
"It is," said Tom, simply.
I am not going to tire my readers with the details leading up to the casting of Tom's big can-
