...and grind and mix them together, and apply heat, the consequence is, that the substance eofcens, and softens, and softens, as the degree of heat increases, until it reaches a certain hight ill the thermometer, say 212° Fahrenheit, or along there, a little more or less. " Anybody who...

...Hayward, and discovered the art of vulcanizing it. This invention is thus described by Mr. Webster, hi his great speech at Trenton : " The great peculiarity...until it reaches a certain height in the thermometer, Bay 212° Farenheit and along there, a little more or less. Well, anybody," says Mr. Webster, " who...