all my strength into a supreme effort to move the thing even a hair’s breadth—but the results were as barren as when we had been traveling at top speed. 

 I shook my head sadly, and motioned to the starting lever. Perry pulled it toward him, and once again we were plunging downward toward eternity at the rate of seven miles an hour. I sat with my eyes glued to the thermometer and the distance meter. The mercury was rising very slowly now, though even at 145 degrees it was almost unbearable within the narrow confines of our metal prison. 

 About noon, or twelve hours after our start upon this unfortunate journey, we had bored to a depth of eighty-four miles, at which point the mercury registered 153 degrees F. 

 Perry was becoming more hopeful, although upon what meager food he sustained his optimism I could not conjecture. From cursing he had turned to singing—I felt that the strain had at last affected his mind. For several hours we had not spoken except as he asked me for the readings of the instruments from time to time, and I announced them. My thoughts were filled with vain regrets. I recalled numerous acts of my past life which I should have been glad to have had a few more years to live down. There was the affair in the Latin Commons at Andover when Calhoun and I had put gunpowder in the stove—and nearly killed one of the masters. And then—but what was the use, I was about to die and atone for all these things and several more. Already the heat was sufficient to give me a foretaste of the hereafter. A few more degrees and I felt that I should lose consciousness. 

 “What are the readings now, David?” Perry’s voice broke in upon my somber reflections. 

 “Ninety miles and 153 degrees,” I replied. 

 “Gad, but we’ve knocked that thirty-mile-crust theory into a cocked hat!” he cried gleefully. 

 “Precious lot of good it will do us,” I growled back. 

 “But my boy,” he continued, “doesn’t that temperature reading mean anything to you? Why it hasn’t gone up in six miles. Think of it, son!” 

 “Yes, I’m thinking of it,” I answered; “but what difference will it make when our air supply is exhausted whether the temperature is 153 degrees or 153,000? We’ll be just as dead, and no one will know the difference, anyhow.” But I must admit that for some unaccountable reason the stationary temperature did renew my waning hope. What I 

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