1770
| 1770 • Joseph Priestley, British chemist, recommends the use of a rubber to remove pencil marks. |
1851
Age: 81y
| 1851 • Northwestern University is founded in Illinois. |
Age: 81y
| 1770 • Joseph Priestley, British chemist, recommends the use of a rubber to remove pencil marks. |
| 1851 • Northwestern University is founded in Illinois. |