"A few years ago, he and his assistant, James Collier, turned their attention toward discovering a catalyst which would do for the metabolic reactions in animal life what his light rays did for plants. What his method was, I will not disclose for obvious reasons, but suffice it to say that he met with great success. He took a puppy and by treating it with his catalytic drugs, made it grow to maturity, pass through its entire normal life span, and die of old age in six months." * * * * * "That is very interesting, Doctor, but I fail to see what bearing it has on the robbery." "Mr. Rogers, how, on a dark day and in the absence of a timepiece, would you judge the passage of time?" "Why, by my stomach, I guess." "Exactly. By your metabolic rate. You eat a meal, it digests, you expend the energy which you have taken into your system, your stomach becomes empty and your system demands more energy. You are hungry and you judge that some five or six hours must have passed since you last ate. Do you follow?" "Certainly." "Let us suppose that by means of some tonic, some catalytic drug, your rate of metabolism and also your rate of expenditure of energy has been increased six fold. You would eat a meal and in one hour you would be hungry again. Having no timepiece, and assuming that you were in a light-proof room, you would judge that some five hours had passed, would you not?" "I expect so." "Very well. Now suppose that this accelerated rate of digestion and expenditure of energy continued. You would be sleepy in perhaps three hours, would sleep about an hour and a quarter, and would then wake, ready for your breakfast. In other words, you would have lived through a day in four hours." "What advantage would there be in that?" "None, from your standpoint. It would, however, increase the rate of reproduction of cattle greatly and might be a great boom to agriculture, but we will not discuss this phase now. Suppose it were possible to increase your rate of metabolism and expenditure of energy, in other words, your rate of living, not six times, but thirty thousand times. In such a case you would live five minutes in one one-hundredth of a second." "Naturally, and you would live a year in about seventeen and one-half minutes, and a normal lifespan of seventy years in about twenty hours. You would be as badly off as any common may-fly." * * * * *