Dog Whistles

Name: Dog Whistles
Uploaded: 2010-06-22T18:00:29+00:00
Duration: 1 min 15 s
Channel: ralphmessa
Description: http://factza.com/technology/gadgets/dog-whistles/ A dog whistle (also renowned as silent whistle or Galton's whistle) is a kind of whistle utilised in the training of dogs and cats. It was created by Francis Galton.

ralphmessa

http://factza.com/technology/gadgets/dog-whistles/ A dog whistle (also  renowned  as silent whistle or Galton's whistle) is a  kind  of whistle  utilised  in the training  of dogs and cats. It was  created  by Francis Galton.

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