"What's the matter with you?" cried Jackson uglily.
"I want Captain Putnam to examine that hammer."
"There ain't nothing wrong with it."
"Possibly not. But please remember that I used the one marked A."
"So did I," came from Powell.
Captain Putnam brushed forward.
"I will look at that hammer, please," he said to Larson quietly. He knew that the cadets had several hammers for practicing throwing in the camp.
"I—I guess it's all right," faltered Larson. "This hammer is marked B."
"B!" cried Tom. "That B hammer is about half a pound lighter than the one marked A."
"It ain't so!" yelled Jackson.