Sir James Dewar was born on September 20, 1842 and died on March 27, 1923. Sir James Dewar would have been 80 years old at the time of death or 169 years old today.
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Sir James George Frazer was born on January 1, 1854 and died on May 7, 1941. Sir James George Frazer would have been 87 years old at the time of death or 158 years old today.