“But tell me, May,” said Phil, “do they really suck messages through tubes two miles long?”
“Indeed they do, Phil. You see, the General Post-Office in London is in direct communication with all the chief centres of the kingdom, such as Birmingham, Liverpool, Manchester, Edinburgh, Glasgow, Dublin, Cork, etcetera, so that all messages sent from London must pass through the great hall at St. Martin’s-le-Grand. But there are many offices in London for receiving telegrams besides the General Post-Office. Suppose that one of these offices in the city receives numerous telegrams every hour all day long,—instead of transmitting these by wire to the General Post-Office, to be re-distributed to their various destinations, they are collected and put bodily into cylindrical leather cases, which are inserted into pneumatic metal tubes. These extend to our central office, and through them the telegrams are sucked just as they are written. The longest tube, from the West Strand, is about two miles, and each bundle or cylinder of telegrams takes about three minutes to travel. There are upwards of thirty such tubes, and the suction business is done by two enormous fifty-horse-power steam-engines in the basement of our splendid building. There is a third engine, which is kept ready to work in case of a break-down, or while one of the others is being repaired.”
“Ah! May, wouldn’t there be the grand blow-up if you were to burst your boilers in the basement?” said Phil.
“No doubt there would. But steam is not the only terrible agent at work in that same basement. If you only saw the electric batteries there that generate the electricity which enables us up-stairs to send our messages flying from London to the Land’s End or John o’ Groat’s, or the heart of Ireland! You must know that a far stronger battery is required to send messages a long way than a short. Our Battery Inspector told me the other day that he could not tell exactly the power of all the batteries united, but he had no doubt it was sufficient to blow the entire building into the middle of next week. Now you know, Phil, it would require a pretty severe shock to do that, wouldn’t it? Fortunately the accidental union of all the batteries is impossible. But you’ll see it for yourself soon. And it will make you open your eyes when you see a room with three miles of shelving, on which are ranged twenty-two thousand battery-jars.”
“My dear,” said Miss Lillycrop, with a mild smile, “you will no doubt wonder at my ignorance, but I don’t understand what you mean by a battery-jar.”
“It is a jar, cousin, which contains the substances which produce electricity.”
“Well, well,” rejoined Miss Lillycrop, dipping the sugar-spoon into the slop-bowl in her abstraction, “this world and its affairs is to me a standing miracle. Of course I must believe that what you say is true, yet I can no more understand how electricity is made in a jar and sent flying along a wire for some hundreds of miles with messages to our friends than I can comprehend how a fly walks on the ceiling without tumbling off.”
“I’m afraid,” returned May, “that you would require to study a treatise on Telegraphy to comprehend that, but no doubt Phil will soon get it so clearly into his head as to be able to communicate it to you.—You’ll go to the office with me on Monday, won’t you, Phil?”
“Of course I will—only too glad to begin at once.”
“My poor boy,” said May, putting her hand on her brother’s arm, “it’s not a very great beginning of life to become a telegraph-messenger.”