CHAPTER XIV.

did not entirely conquer his difficulties. He was an ardent lover of the beautiful, and it was a constant effort with him to render his productions as attractive to the eye as possible. Upon one occasion, while bronzing a piece of rubber cloth, he applied aqua fortis to it for the purpose of removing the bronze from a certain part. It took away the bronze as he had designed, but it also discolored the cloth to such a degree that he supposed it ruined, and threw it away. A day or two later, he chanced to remember that he had not examined very closely into the effect of the aqua fortis upon the rubber, and thereupon instituted a search for it. He was fortunate enough to find it, and was overjoyed to discover that the rubber had undergone a remarkable change, and that the effect of the acid was to harden it to such an extent that it would now stand a degree of heat which would have melted it before. When the reader remembers that aqua fortis is a compound two-fifths of which is sulphuric acid, he will understand that Mr. Goodyear had almost mastered the secret of vulcanizing rubber. He does not appear, however, to have known the true nature of aqua fortis, and called his process the "curing" of India-rubber by the use of that acid.