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Sir
John Ambrose Fleming
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DOCUMENTS:
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| Letter to Marconi November 30, 1904 |
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This
is a three page
letter
sent to Marconi from J Ambrose Fleming revealing to Marconi his
invention
of the Thermionic valve. The letter begins with Fleming congratulating
Marconi on his honor awarded by Glasgow University which was presented
to him by Lord Kelvin. He continues by mentioning that with Marconi
spending
a lot of time away, they had had little time to discuss business, but
had
read reports of all evidence in the Forest case. Fleming comments:
'I agree that we have
a very
strong case but I think there are elements of doubt how, from this
judgment
will give a monopoly of all forms of Hertzian wave telegraphy to you,
but
I hope that it will do so.'
Fleming goes on to tell Marconi about his own experiments and achievements, these include the development of an instrument 'which can measure exactly the wavelength of electric waves up to one mile in length' , this he called a kummeter, and his discovery of 'a method of rectifying electrical oscillations, that is making the flow of electricity all in the same direction so that I can detect them with an ordinary mirror galvanometer'. Fleming concludes this correspondence by saying; ' This opens up a wide field for work as I can now measure exactly the effect of the transmitter. I have not mentioned this to anyone yet as it may become very useful.'