"Because Jimpsonberry wouldn't have 'em if I discovered 'em," said the Idiot. "I judge from the millions he raises every year that he is satisfied with dandelions as they are. He's got enough for himself, and never makes any charge for those he gives to his neighbors." "I think a furnace-feeder would be a good thing, too," the Idiot continued, in a moment. "My furnace is a chronic sufferer from indigestion because on some days it is gorged with coal and on others with ashes. Seems to me if I could get a month's time in which to concentrate my attention upon a furnace-feeder, I could devise some kind of a contraption that would invoke the enthusiastic love of the suburban resident in Arctic latitudes the world over." "I have often thought of that possibility myself," observed Mr. Pedagog, his eyes fondly resting upon a steaming plate of griddle-cakes that had just been brought in. "But coal is a rebellious quantity. A furnace-feeder would need to be delicately adjusted, and coal cannot be handled with delicacy. It requires a chute rather than a tube. It must be manipulated with the shovel, not the sugar-tongs." "Correct," said the Idiot. "Therefore, _you_ would experiment on a chute or a shovel, abandoning all idea of refining the coal. I, on the other hand, would experiment with the coal itself, Mr. Pedagog. Why not liquefy it, and let it drop automatically into the furnace through a self-acting spigot?" "Liquefy coal?" asked Mr. Pedagog. "Certainly," replied the Idiot. "We liquefy pretty nearly everything else. If liquid air, why not liquid coal? Everything we have in nature in these days apparently can be liquefied, and while I am not familiar with the process, I see no reason why a ton of coal should not be reduced to such a shape that it can be bottled. Once bottled and provided with an automatic dropper, it could easily be adjusted so as to flow in proper quantities into the furnace at proper intervals." "It would be very expensive. Do you know what a pint of liquid air costs?" demanded the Doctor. "No," said the Idiot. "I neither breathe nor drink it. The plain old stuff is good enough for me, and cheap if you don't have to go to the mountains or the sea-shore to get your supply." "Granting coal could be liquefied," the Doctor assented, "I venture to say that a ton of it would cost as much as five hundred dollars."