These three dynamos were installed in the station, and the other parts of the system were completed. A bank of one thousand lamps was placed in one of the buildings; and in the summer a whole month was spent in making tests of the working of the system, using this bank of lamps instead of sending current out to customers' premises. Edison and his assistants made the station their home during this busy month. They even slept there on cots that he had sent to the station for this purpose. The system tested out satisfactorily, and finally, on September 4, 1882, at three o'clock in the afternoon, the station was started by sending out current from one of the big dynamos through the conductors laid in the streets, and electric light was supplied for the first time to a number of customers in the district. The station was now started and everything went well. New customers were added daily, and very soon it became necessary to supply more current. This called for the operation of two dynamos at one time. As this involved new problems, Edison chose a Sunday to try it, when business places would be closed. We will let him tell the story. He says: "My heart was in my mouth at first, but everything worked all right.... Then we started another engine and threw the dynamos in parallel. Of all the circuses since Adam was born, we had the worst then! One engine would stop, and the other would run up to about a thousand revolutions, and then they would see-saw. The trouble was with the governors. When the circus commenced the gang that was standing around ran out precipitately, and I guess some of them kept running for a block or two. I grabbed the throttle of one engine, and E. H. Johnson, who was the only one present to keep his wits, caught hold of the other, and we shut them off." One of the gang that ran, but, in this case, only to the end of the room, afterward said: "At the time it was a terrifying experience, as I didn't know what was going to happen. The engines and dynamos made a horrible racket, from loud and deep groans to a hideous shriek, and the place seemed to be filled with sparks and flames of all colors. It was as if the gates of the infernal regions had been suddenly opened." Edison attacked this problem in his strenuous way. Although it was Sunday, he sent out and gathered his men and opened the machine-works to make new appliances to overcome this trouble. Space will not permit of telling all the methods he applied until the difficulty was entirely conquered. It was only a short time, however, before he was able to operate two or any number of dynamos all together as one, in parallel, without the least trouble.