"They're trying hard to get something practical," said Bert. "Marconi himself is testing out a plan that he thinks will work all right. His idea is to get a call that will be really one long dash, so that it won't be confounded with any letter of the alphabet. He figures on making this so strong that it will pass through a very sensitive instrument with sufficient force to ring a bell, that will be at the bedside of the operator."
"Rather rough on a fellow, don't you think?" joined in the ship's doctor. "If he were at all nervous, he might lie there awake, waiting for the bell to ring. It reminds me of a friend of mine, who once put up at a country hotel. He was told that the man who slept in the next room was very irritable and a mere bundle of nerves. He couldn't bear the least noise, and my friend promised to keep it in mind. He was out rather late that night, and when he started to retire he dropped one of his shoes heavily on the floor. Just then he remembered his nervous neighbor. He went on undressing quietly, walked about on tiptoe, put out the light, and crept into bed. Just as he was going off to sleep, a voice came from the other room: 'Say, when in thunder are you going to drop that other shoe?'"
"In the meantime," went on Bert, when the laugh had subsided, "they've got an ingenious device on some of the British ships. It seems rather cruel, because they have to use a frog. You know how sensitive frogs are to electricity. Well, they attach a frog to the receiving end, and under him they put a sheet of blackened paper. As the dots and dashes come in, the current jerks the frog's legs over the paper. The leg scrapes the black away, and leaves white dots and dashes. So that you can pick up the paper and read the message just like any other, except that the letters are white instead of black."
"Poor old frogs," said Ralph. "If they knew enough, they'd curse the very name of electricity. Galvani started with them in the early days, and they've still got to 'shake a leg' in the interest of science."
"Yes," murmured Tom, "it's simply shocking."
He ducked as Ralph made a playful pass at him.
"There's been quite a stir caused by it," went on Bert, calmly ignoring Tom's awful pun, "and the humane societies are taking it up. The probability is that it will be abolished. It certainly does seem cruel."