Mother decided that 10-year-old Cathy should get something 'practical' for her birthday.
"Suppose we open a savings account for you?" mother suggested. Cathy was delighted.
"It's your account, Darling," mother said as they arrived at the bank, "so you fill out the application."
Cathy was doing fine until she came to the space for 'Name of your former bank.' After a slight hesitation, she put down, 'Piggy.'
Arthur Jeffrey DempsterBorn 14 Aug 1886; died 11 Mar 1950 at age 63.Canadian-American physicist who in 1918 built the first mass spectrometer (based on the invention of Francis W. Aston) and discovered isotope uranium-235 (1935). The mass spectrometer is an instrument that uses electric and magnetic fields to separate and measure a sample's atoms according to their mass and relative quantity. In 1935, he discovered that naturally occurring uranium, though mostly uranium-238, contained 0.7% U-235 (later used as the primary fuel in atomic bombs and reactors after Niels Bohr predicted it could be used to produce a chain reaction releasing huge amounts of nuclear fission energy). During WW II, Dempster worked with the secret Manhattan Project that developed the world's first nuclear weapons.« |
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