“And what do you find?”

“Is it valuable?” demanded Ned, who, with Bob, was at his chum’s home.

“Does it contain gold or diamonds?” Bob wanted to know, eagerly.

“Neither one,” and the professor smiled.

“Perhaps it is the sort of clay that contains aluminum,” suggested Jerry, a bit apprehensive at the look on the face of the professor.

“No, Jerry, nor aluminum either.”

“Is it good for anything?” asked the tall lad, desperately.

“Well, Jerry, as nearly as I can tell, and I have subjected it to numberless tests, that yellow clay would make excellent material for filling in waste land, but that’s all,” was the disappointing answer of the scientist.

“Then it isn’t any good?” faltered Jerry.