'I do not believe in your apports, Mr. Nemor, and I do not believe in your machine. My time is valuable, and if we are to have any sort of demonstration I would beg you to proceed with it without further ceremony. '

'Then you will be pleased to follow me,' said the inventor. He led us down the stair of the flat and across a small garden which lay behind. There was a considerable outhouse, which he unlocked and we entered.

Inside was a large whitewashed room with innumerable copper wires hanging in festoons from the ceiling, and a huge magnet balanced upon a pedestal. In front of this was what looked like a prism of glass, three feet in length and about a foot in diameter. To the right of it was a chair which rested upon a platform of zinc, and which had a burnished copper cap suspended above it. Both the cap and the chair had heavy wires attached to them, and at the side was a sort of ratchet with numbered slots and a handle covered with indiarubber which lay at present in the slot marked zero.

'Nemor's Disintegrator,' said this strange man, waving his hand towards the machine

'This is the model which is destined to be famous, as altering the balance of power among the nations. Who holds this rules the world. Now, Professor Challenger, you have, if I may say so, treated me with some lack of courtesy and consideration in this matter. Will you dare to sit upon that chair and to allow me to demonstrate upon your own body the capabilities of the new force?'

Challenger had the courage of a lion, and anything in the nature of a defiance roused him in an instant to a frenzy He rushed at the machine, but I seized his arm and held him back.

'You shall not go,' I said. 'Your life is too valuable. It is monstrous. What possible guarantee of safety have you? The nearest approach to that apparatus which I have ever seen was the electrocution chair at Sing Sing.'

'My guarantee of safety,' said Challenger, 'is that you are a witness and that this person would certainly be held for manslaughter at the least should anything befall me.'

'That would be a poor consolation to the world of science, when you would leave work unfinished which none but you can do. Let me, at least, go first, and then, when the experience proves to be harmless, you can follow.'

Personal danger would never have moved Challenger, but the idea that his scientific work might remain unfinished hit him hard. He hesitated, and before he could make up his mind I had dashed forward and jumped into the chair. I saw the inventor put his hand to the handle. I was aware of a click. Then for a moment there was a sensation of confusion and a mist before my eyes. When they cleared, the inventor with his odious smile was standing before me, and Challenger, with his apple-red cheeks drained of blood and colour, was staring over his shoulder.

'Well, get on with it!' said I.

'It is all over. You responded admirably,' Nemor replied. 'Step out, and Professor Challenger will now, no doubt, be ready to take his turn.'

I have never seen my old friend so utterly upset. His iron nerve had for a moment completely failed him. He grasped my arm with a shaking hand.

'My God, Malone, it is true,' said he. 'You vanished. There is not a doubt of it. There was a mist for an instant and then vacancy.'

'How long was I away?'

'Two or three minutes. I was, I confess, horrified. I could not imagine that you would return.