Goodyear was in despair, for he had just made another discovery that seemed to promise success--the discovery that sulphur was the active "curing" agent for India-rubber, and that it was the sulphuric acid in aqua fortis which had wrought the changes in rubber which he had noticed in his experiments. One day, while explaining the properties of a sulphur-cured piece of rubber to an incredulous crowd in a country-store, he happened to let it fall on the red-hot stove. To his amazement it did not melt; it had shrivelled some, but had not softened. And, at last, he had the key, which was that rubber mixed with sulphur and subjected to a certain degree of heat, would be rendered impervious to any extremes of temperature! But what degree of heat? He experimented in the oven of his wife's cooking-stove, and in every other kind of oven to which he could gain access; he induced a brick-layer to make him an oven, paying him in rubber aprons; he grew yellow and shrivelled, for he and his family were living upon the charity of neighbors; more than once, there was not a morsel of food in the house; his friends thought seriously of shutting him up in an asylum; he tried to get to New York, but was arrested for debt, and thrown into prison. Even in prison, he tried to interest men with capital in his discovery, for he needed delicate and expensive apparatus, and at last two brothers, William and Emory Rider agreed to advance him a certain sum. The laboratory was built, and in 1844, Goodyear astonished the world by producing perfect vulcanized India-rubber with economy and certainty. The long and desperate battle had been won! Did he reap a fortune? By no means! In one way or another, he was defrauded of his patent rights. In England, for instance, another man who received a copy of the American patent, actually applied for and obtained the English rights in his own name. In 1858, the United States Commissioner of Patents said, "No inventor, probably, has ever been so harassed, so trampled upon, so plundered by that sordid and licentious class of infringers known in the parlance of the world as 'pirates.'" Worn out with work and disappointment, Goodyear died two years later, a bankrupt. But his story should be remembered, and his memory honored, by every American. * * * * * Near a little mountain hamlet of central Sweden stands a great pyramid of iron cast from ore dug from the neighboring mountains. It is set up on a base of granite also quarried from those mountains, and bears upon it two names, Nils Ericsson and John Ericsson. The monument marks the place where these two men were born. The life of the former was passed in Sweden and does not concern us, but John Ericsson's name is closely connected with the history of the United States.