Looking for quotation by Lord kelvin

Thought I'd take a chance that some engineering type here has heard the
quotation for which I am searching.
This quote, which I will not try to paraphrase, speaks to the issue of
knowledge, and how, even if you are familiar with a subject, your knowledge
is incomplete unless you are able to measure and express in numbers what you
are talking about.
Anybody heard this one? It's in a book around here somewhere.
Thanks in advance.
Reply to
BFoelsch
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It's quite easy to find it via Google, y'know?
William Thomson (Lord Kelvin) (1824 - 1907) : When you measure what you are speaking about and express it in numbers, you know something about it, but when you cannot express it in numbers your knowledge about is of a meagre and unsatisfactory kind. Quoted in D MacHale, Comic Sections (Dublin 1993)
"BFoelsch" snipped-for-privacy@snet.ditch.this.net wrote :
Reply to
Oliver Clouds
I'm embarrassed!
Never thought about using Google to find a quotation.
Anyway, thanks for the help.
Reply to
BFoelsch
A better version is: "If you can't measure it, you can't control it."
Al
Reply to
Al
Why do you say it is "better version"? Art.
Reply to
art

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