On the way to preschool, a doctor had left his stethoscope on the car seat, and his little girl picked it up and began playing with it.
"Be still, my heart," thought the doctor. "My daughter wants to follow in my footsteps!"
Then the child spoke into the instrument, "Welcome to McDonald's. May I take your order?"
Henry Augustus RowlandBorn 27 Nov 1848; died 16 Apr 1901 at age 52. American physicist who invented the concave diffraction grating, which replaced prisms and plane gratings in many applications, and revolutionized spectrum analysis--the resolution of a beam of light into components that differ in wavelength. His first major research was an investigation of the magnetic permeability of iron, steel and nickel, work which won the praise of Maxwell. Another experiment was the first to conclusively demonstrate that the motion of charged bodies produced magnetic effects. In the late 1870s, he established an authoritative figure for the absolute value of the ohm, and redetermined the mechanical equivalent of heat in the early 1880s, demonstrating that the specific heat of water varied with temperature. |
