"But it would be awkward," said George, with a smile, "if we also had to except the case of solids. For instance, let us take the solid earth. One mile square equals one square mile. Therefore two miles square must equal two square miles. Is this so?"
"Well, let me see! No, of course not," Mr. Filkins replied, "because two miles square is four square miles."
"Then," said George, "if the axiom is not true in these cases, when is it true?"
Mr. Filkins promised to look into the matter, and perhaps the reader will also like to give it consideration at leisure.
"Look here, George," said his cousin Reginald Woolley: "by what fractional part does four-fourths exceed three-fourths?"
"By one-fourth!" shouted everybody at once.
"Try another one," George suggested.
"With pleasure, when you have answered that one correctly," was Reginald's reply.
"Do you mean to say that it isn't one-fourth?"
"Certainly I do."