Part 53 (2/2)

'Well, she does not know, or does not mind, and they are pretty inseparable the last day or two.'

'That is your own fault,' said Lady Bude; 'you banter the poet so cruelly. She pities him.'

'I wonder that our host lets the fellow keep staying here,' said Merton.

'If Mr. Macrae has a foible, except that of the pedigree of the Macraes (who were here before the Macdonalds or Mackenzies, and have come back in his person), it is scientific inventions, electric lighting, and his new toy, the wireless telegraph box in the observatory. You can see the tower from here, and the pole with box on top. I don't care for that kind of thing myself, but Macrae thinks it Paradise to get messages from the Central News and the Stock Exchange up here, fifty miles from a telegraph post. Well, yesterday Blake was sneering at the whole affair.'

'What is this wireless machine? Explain it to me,' said Lady Bude.

'How can you be so cruel?' asked Merton.

'Why cruel?'

'Oh, you know very well how your s.e.x receives explanations. You have three ways of doing it.'

'Explain _them_!'

'Well, the first way is, if a man tries to explain what ”per cent” means, or the difference of ”odds on,” or ”odds against,” that is, if they don't gamble, they cast their hands desperately abroad, and cry, ”Oh, don't, I never _can_ understand!” The second way is to sit and smile, and look intelligent, and think of their dressmaker, or their children, or their young man, and then to say, ”Thank you, you have made it all so clear!”'

'And the third way?'

'The third way is for you to make it plain to the explainer that he does not understand what he is explaining.'

'Well, try me; how does the wireless machine work?'

'Then, to begin with a simple example in ordinary life, you know what telepathy is?'

'Of course, but tell me.'

'Suppose Jones is thinking of Smith, or rather of Smith's sister. Jones is dying, or in a row, in India. Miss Smith is in Bayswater. She sees Jones in her drawing-room. The thought of Jones has struck a receiver of some sort in the brain, say, of Miss Smith. _But_ Miss Smith may not see him, somebody else may, say her aunt, or the footman. That is because the aunt or the footman has the properly tuned receiver in her or his brain, and Miss Smith has not.'

'I see, so far--but the machine?'

'That is an electric apparatus charged with a message. The message is not conducted by wires, but is merely carried along on a new sort of waves, ”Hertz waves,” I think, but that does not matter. They roam through s.p.a.ce, these waves, and wherever they meet another machine of the same kind, a receiver, they communicate it.'

'Then everybody who has such a machine as Mr. Macrae's gets all Mr.

Macrae's messages for nothing?' asked Lady Bude.

'They would get them,' said Merton. 'But that is where the artfulness comes in. Two Italian magicians, or electricians, Messrs. Gianesi and Giambresi, have invented an improvement suggested by a dodge of the Indians on the Amazon River. They make machines which are only in tune with each other. Their machine fires off a message which no other machine can receive or tap except that of their customer, say Mr. Macrae.

The other receivers all over the world don't get it, they are not in tune. It is as if Jones could only appear as a wraith to Miss Smith, and _vice versa_.'

'How is it done?'

'Oh, don't ask me! Besides, I fancy it is a trade secret, the tuning.

There's one good thing about it, you know how Highland landscape is spoiled by telegraph posts?'

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