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RESEARCHES ON FUNGI 



Fig 



179. Three luminous Oak and two luminous Beech leaves obtained from a 



forest floor at Four Oaks, Warwickshire, England. The right top Oak leaf was 

 luminous all over, while the luminosity in the other leaves was confined to their 

 lighter and more decayed parts. The leaves fell in the autumn of 1922 and were 

 collected July 7, 1923. Natural size. 



