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- Path: sparky!uunet!pipex!pavo.csi.cam.ac.uk!rf
- From: rf@cl.cam.ac.uk (Robin Fairbairns)
- Subject: Re: Swedish Adding Machine (was: Help Wanted)
- Message-ID: <1992Nov20.115538.5378@infodev.cam.ac.uk>
- Sender: news@infodev.cam.ac.uk (USENET news)
- Nntp-Posting-Host: lelaps.cl.cam.ac.uk
- Organization: U of Cambridge Computer Lab, UK
- References: <PCL.92Nov19174841@black.oxford.ac.uk>
- Date: Fri, 20 Nov 1992 11:55:38 GMT
- Lines: 45
-
- In article <PCL.92Nov19174841@black.oxford.ac.uk>, pcl@oxford.ac.uk (Paul Leyland) writes:
- |> Last weekend, I acquired a wind-up mechanical adding machine.
-
- Yeah - I've got one too (came from an Oxfam shop!).
-
- |> I used to use machines very like this almost 20 years ago when I was a
- |> undergraduate.
-
- When I came to the Maths Lab here (predecessor of the Computer Lab) as
- a graduate student in 1967, each of us had such a calculator on his/her
- desk. We were encouraged (by one lecturer, now deceased) to use them.
- Of course, since my father was in Life Assurance, I already knew how.
-
- |> They were already obsolescent, and I was one of only a
- |> very few who took the trouble to learn how they worked. After a
- |> while, I could perform addition/subtraction as fast as I could on a
- |> calculator; multiplication and division were slower, but not too much
- |> slower. I even extracted square roots by Newton Raphson in a
- |> reasonable time. *And* I didn't have to worry about batteries going
- |> flat. I've got rusty since then, but I expect I'll soon pick it up
- |> again.
-
- Of course, in 1968, comparison with electronic (pocket) calculators
- wasn't much of an issue.
-
- |> The real reason I got the machine was that it is a beautiful
- |> mechanism. If it can be persuaded to work again, that's a real bonus.
-
- Yes - they're wonderful machines (mine's actually a Brunsviga). It
- works, but I would characterise my one's use as "executive toy mode"
- (embarrassed grin - I'm not _really_ an executive, y'know ;-)
-
- |> I can easily believe they designed the bomb on machines like this. It
- |> is such a great advance on the slide rule for simple arithmetic. Yes,
- |> I do still use a guessing stick every now and again, just to keep in
- |> practice. Again, zero power requirement is very re-assuring to
- |> oldsters like me.
-
- Youngsters like you probably wouldn't be used to the concept of these
- machines being the primary support for the (human) _computers_ who did
- big sums for people...
- --
- Robin (come back John Drummond) Fairbairns rf@cl.cam.ac.uk
- U of Cambridge Computer Lab, Pembroke St, Cambridge CB2 3QG, UK
- "They had twelve years to lay in wait for us" - Bush supporter on Nov 4
-