In the Laboratory, Edison works, secure and free from interruption unless he invites it. Much of his time is spent in the Chemical Building, a low, one-story structure, lighted from the top. It has a cement floor and very simple furniture, the shelves and tables being mostly of iron. "We are always prepared for fires and explosions here," said Edison in half-apology for the barrenness of the rooms.
The place is a maze of retorts, kettles, tubes, siphons and tiny brass machinery. In the midst of the mess stood two old-fashioned armchairs--both sacred to Edison. One he sits in, and the other is for his feet, his books, pads and paper.
Here he sits and thinks, reads or muses or tells stories or shuffles about with his hands in his pockets. Edison is a man of infinite leisure. He has the faculty of throwing details upon others. At his elbow, shod in sneakers silent, is always a stenographer. Then there is a bookkeeper who does nothing but record the result of every experiment, and these experiments are going on constantly, attended to by half a dozen quiet and alert men, who work like automatons. "I have tried a million schemes that will not work--I know everything that is no good. I work by elimination," says Edison.
When hot on the trail of an idea he may work here for three days and nights without going home, and his wife is good enough and great enough to leave him absolutely to himself. In a little room in the corner of the Laboratory is a little iron cot and three gray army blankets. He can sleep at any time, and half an hour's rest will enable him to go on. When he can't quite catch the idea, he closes up his brain-cells for ten minutes and sleeps, then up and after it again.
Mrs. Edison occasionally sends meals down for the Wizard when he is on the trail of a thought and does not want to take time to go home.
One day the dinner arrived when Edison was just putting salt on the tail of an idea. There was no time to eat, but it occurred to the inventor that if he would just quit thinking for ten minutes and sleep, he could awaken with enough brain-power to throw the lariat successfully. So he just leaned back, put his feet in the other chair and went to sleep.
The General Manager came in and saw the dinner on the table and Edison sleeping, so he just sat down and began to eat the dinner. He ate it all, and tiptoed out.