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On Sun, 3 Feb 2013, Philip Whateley wrote:
On 03/02/13 15:07, Gordon Henderson wrote:On Sun, 3 Feb 2013, Peter Lloyd-Jones wrote:On 1 February 2013 17:15, e-mail greybear2k5 <greybear2k5@xxxxxxxxxxxxxxxx>wrote:I have a 40 year old working analogue computer, results are not too precise but near enough for many uses. It's called a slide rule.Hi Jimbo But they never managed to solve the floating decimal point problem!I don't recall floating point being a problem when I've used slide rules. The knack is to be able to work out the right magnitude of the result in your head then work from there. So - Pi * 724 is going to be 2 thousand and something, so about 2270 on the slide rule: http://unicorn.drogon.net/slide.jpg Hm. It's a bit grubby. Maybe I ought to clean it up a bit. GordonOooh! I remember British Thornton. I've got an AD 150 I used at school....really fancied one of the cylindrical ones though.
Cylindrical? They're really (really!) old ... Not circular? The only circular one I have is from my flying days: http://unicorn.drogon.net/circ.jpg Not a calculator as such, but more for doing stuff you need for flying - e.g. various fuel density calculations, distances, temperatures, etc. What I really want is a curta calculator... Gordon -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq