One of the stage hands gave the helper the address of the nearest physician, and, fortunately, he was in his office. The doctor came at once and put a soothing ointment on the burns of the professor's back, where the electric sparks had penetrated his clothing. "That's better," remarked the magician with a sigh of relief. "I guess we'll have to ring down the curtain, Joe. I can't go on." "I'll finish the show," declared the boy wizard. "Can you do it?" "Not as well as you, of course. But I think I can keep them interested, so they will feel they have had their money's worth. I'll carry on the show. I can vary my egg and watch tricks a bit, and I'll do that wine and water one, bringing the live guinea pig out of the bottle." "All right, Joe, if you think you can. I'm not equal to any more. I think I'd better go to the hotel." "I think so too, Professor. Now don't worry. I'll carry on the show as best I can." "And I think you can do it well, Joe. I'm proud of you. If it hadn't been for you stopping the electric current when you did I would be dead now." "Oh, I hardly think it was as bad as that." "Yes it was. One of those wires broke. After this I'll examine every connection a minute before I go into the cabinet. You saved my life--this is the second time. Once at the fireworks factory, and again to-night. I'll be so deeply in your debt, Joe, that I can never pay you." "Oh, don't worry about that," laughed the boy wizard, now much relieved in mind. With the professor safe he could go out on the stage with a light heart and an easy mind. He was used to facing the public, but this meant that he would have to do more tricks than usual, and some that were particularly the professor's own, though Joe knew how they were worked. When the physician had relieved the sufferer, Joe called a carriage and sent the magician to the hotel where they were staying. Then the pantomimist having finished, Joe prepared to go on with some illusions. And right here, while Joe is making his preparations, a description of the "fire trick" can be given. The cabinet was, of course, a trick one. That is, it was provided with hidden electric contrivances so that when the professor stepped into it, by merely pressing a button he could have a shower of sparks shot out all around him. As he was insulated, these sparks could not injure him. On the heavy silk robe he wore there had been painted the grinning skeleton. It was painted with a secret chemical paint, and when subjected to a flow of electricity the bones and skull showed outlined in fire. The professor, keeping well back toward the rear of the cabinet, was invisible.