18th Century (jan 1, 1701 – dec 31, 1800)
Description:
- Gabriel Fahrenheit (1686 - 1736) created the first mercury thermometer in 1714
- John Hunter (1728 - 1793) an English surgeon who established scientific surgical procedures and introduced tube feeding in 1778.
- Benjamin Franklin (1706 - 1790) invented bifocals for glasses in 1784
The average life span was 40 - 50 years
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