I read website of the Plastics Historical Society (Charles Goodyear 1800-1860 invented vulcanization of rubber) and it is very interesting, so I want to practice about academic vocabulary by using AWL Gapmaker.
Gap File produced at level 4
Charles Goodyear was born on 29 December 1800 in New Haven, Connecticut, USA - the first of 6 children born to Amasa and Cynthia Goodyear. Amasa was a farmer, inventor and manufacturer of farm implements and famous for buttons, being credited as the first manufacturer of pearl buttons in America.
The first rubber manufactory had been set up at Roxbury, Mass. in 1833 for making waterproof textiles and other items- but these were not satisfactory; the rubber melted in summer and cracked in winter. Charles Goodyear turned his attention to 'curing' this problem, working at his home. He was impoversihed but managed to find enough financial backing for this work, and was granted a patent in 1837 for an acid gas process - winning medals for his displays of rubber goods.
In 1838 Goodyear purchased the former Eagle India Rubber Company which had come into the hands of Nathaniel Hayward. He assisted Hayward in taking out a patent (which was assigned to Goodyear) for a combination of rubber with sulphur. Further patents were taken out by Goodyear but he was still in financial trouble and was again imprisoned for debt.
The important vulcanisation patent was granted in June 1844, one month after Hancock (who was aware of Goodyear's work with sulphur) had taken out a similar patent in the UK. In 1858 the patent was extended for a further 7 years.
Goodyear was still in debt when he died on 1 July 1860 of 'gout'. His final illness, however, had many of the symptoms of lead poisoning, and his death has been attributed to the extensive use of white lead in his many vulcanisation experiments.
The following words will fill the gaps:
assisted
attributed
credited
final
financial
financial
granted
granted
implements
items
process
purchased
similar
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