In this book he described the construction of the Galton whistle, an instrument which, refined in some details, is used to this day by psychologists and physiologists for the production of sounds ...

In the summer of 1876, in a workshop on the outskirts of London, Francis Galton was busy fashioning brass tubing into an ultrasonic whistle. This unique sliding whistle would produce high-pitched ...

Strolling along London's Zoological Gardens in 1876, Sir Francis Galton stopped in front of the lion enclosure, pulled out a whistle, and began blowing on it. No sound emitted from the device, ...