Show Captive Monkeys Happy Monkeys no longer mope in the Lon Lon- London Lon London don zoo since they have had Installed over their quarters a roo roof made of a special glass which lets in the ultra ultra- ultraviolet ultraviolet violet Iolet rays According to Dr Chal- Chal Chalmers Chalmers Chal mers Mitchell director of the zoo the violet violet ultra rays which arc are excluded by the ordinary window glass are arc just what the simians crave and they have responded automatically to the stimulus stimulus lus lug They chatter and swing and hurl their coconuts around with twice the abandon they showed before |