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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
green and red
Belgian Blue Stone
film cell
terracotta
purple
purple, white and green
glass
clear
pink
claret
orange
wood
red and black
brushed metal
green
red
bronze
silver
multicoloured
blue
grey
brown
white
marble
slate
gold
black
maroon
brass
stone
yellow
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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