Galileo and Torricelli on the pressure of the air, 16.
Garnett, Dr. Thomas, professor at the Royal Institution, 173.
Gilbert, Dr., founder of electrical science, 3.
Goettingen, Young's university course at, 206.
Graham Bell's telephone, 319.
Gray, Stephen, discovers electric conduction, 3.
Grimaldi's fringes explained by Young, 222.
Gunpowder, Rumford's experiments on, 179.