Thunderstruck - Erik Larson [30]
Preece knew he had angered the Maxwellians, and he likely reveled in the fact, for he did not back off. Far from it—he resolved to devote his next big lecture entirely to Marconi and his wireless. It was scheduled for December 12, 1896, at London’s Toynbee Hall, a settlement house dedicated to social reform based in London’s impoverished East End, in Jack the Ripper’s old hunting ground. Here, Preece knew, his lecture would draw not just scientists but a broad swath of the city’s intellectual community and representatives of the daily press. The British Association had been mere preamble.
As the date approached, Preece roughed out his lecture. He sought maximum effect. Physicists had become increasingly knowledgeable about Hertzian waves, but not the public. A demonstration of telegraphy without wires was likely to strike the Toynbee audience as so magical as to verge on the supernatural.
Marconi agreed to a demonstration but expressed concern about revealing the secrets of his apparatus. His outlook was more that of a magician protecting his tricks than a scientist unveiling a new discovery to peers. He wrote, “I think it desirable just now that no explanation be given as to the means which I employ for obtaining the effects, as I fear it may give rise to discussions which I would rather avoid until my whole study can be laid before some scientific society.”
Marconi satisfied his need for secrecy by concealing his apparatus. He constructed two boxes and painted them black. In one he installed his transmitter, in the other his receiver, with a bell attached. At the start of the lecture one box was at the podium, the other at the far side of the room.
Preece began the lecture with a brief summary of his own efforts to harness induction to signal across bodies of water. But tonight, he said, he would reveal a remarkable discovery made by a young Italian inventor, Guglielmo Marconi. And then, in the finest tradition of late-nineteenth-century scientific lectures, the demonstration began.
First Preece pressed the key at the box that housed the transmitter. The audience heard the loud crack of a spark. At the same instant, the bell in the receiver box rang.
Nearly everyone in the audience had seen magic acts, and many doubtless had attended at least one of the famed shows at the Egyptian Hall in Piccadilly, “England’s Home of Mystery,” directed by a magician named Nevil Maskelyne. Compared to women sawn in half or men levitated to the ceiling, this at first glance was nothing special. It took a moment or two for the audience to absorb the fact that what they were witnessing was not a magic trick but a scientific effect conjured by the great William Preece of the British Post Office, who stood before them exuding as always absolute credibility, his eyes large behind thick glasses, his great beard marking each motion of his head with a tangled whoosh of gray-white whiskers. Still, many in the audience reacted the way Marconi’s father once had, wondering by what clever means Marconi had hidden the wire connecting the two boxes.
Now Preece and Marconi launched a second phase of the demonstration, meant to quash any lingering skepticism. On a cue from Preece, Marconi picked up the black box that housed his receiver and walked with it through the lecture hall. The spark cracked, the bell rang, over and over, but now the audience could see, clearly, that no wire trailed Marconi as he moved. The audience also saw that Marconi was barely an adult, which only increased the wonder of the moment. No matter where Marconi walked, the bell rang.
FAME CAME SUDDENLY. The lay press sought a name for Marconi’s technology and called it space telegraphy or aetheric telegraphy or simply telegraphy without wires. The Strand Magazine sent a writer, H.J.W. Dam, to interview Marconi at his home.
Dam wrote, “He is a tall, slender young man, who looks at least thirty and has a calm, serious manner and a grave precision of speech which further gives the idea of many more years than are his.”
Marconi told Dam that it was possible that he had