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Professor
Sir John Ambrose Fleming
1849-1945 Inventor of the diode radio valve, pioneer in wireless telegraphy. He was a friend of this Observatory and lived in Sidmouth, 1926-1945
Christine Matthews on Geograph
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Colour:
This plaque is
terracotta
purple, white and green
glass
clear
pink
claret
orange
wood
purple
red
gold
multicoloured
white
yellow
brushed metal
brown
slate
brass
silver
bronze
maroon
green
black
blue
film cell
green and red
Belgian Blue Stone
red and black
marble
stone
grey
Wikimedia:
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Subject
Sir John Ambrose Fleming FRS
(1849-1945)
Fellow of the Royal Society
See also...
Spudgun67 on Wikimedia Commons
Sir Edward Frankland FRS 1825-1899, Chemist & Sir John Ambrose Fleming FRS 1849-1945, ...
David Stowell on Geograph