Pencil Stethoscope Tunneling Shield Paved Roads Pencil For Information on the pencil from another lesson, click on the link below https://essaybank.home.blog/2020/02/21/history-lesson-90-the-heliocentric-theory-vesalius-%e2%9c%8f%ef%b8%8fand-the-pencil-%e2%9c%8f%ef%b8%8f/ Stethoscope Laennac invented the stethoscope in France while working at a hospital. He got inspiration from watching children playing a game. One would hold a hollow stick to his/her ear, and the other would …