Ophelia wrote:
>
> "Julie Bove" > wrote in message
> ...
> >
> > "Ophelia" > wrote in message
> > ...
> >>
> >>
> >> "Julie Bove" > wrote in message
> >> ...
> >>>
> >>> "NOYDB" <ljlameres at acd.net> wrote in message
> >>> ...
> >>>>I find that I frequently want to adjust a recipe up or down in
> >>>> quantity. I use an old slide rule to set up the original proportion (
> >>>> set the 1 over the adjusted quantity; 2, 3, .5, whatever ) then read
> >>>> the new quantity directly under the original quantity. Sometimes
> >>>> there's a problem in measuring the new quantity exactly though.
> >>>>
> >>>> Anyway I was wondering if anybody else does this or if I'm just an old
> >>>> geek. I started using a sliderule studying electronics in the '70's.
> >>>
> >>> I've never even used a slide rule! I don't even know what they are
> >>> really. I think my dad had one though.
> >>
> >> I think it is the foreunner of a calculator but I might be wrong
> >
> > Could be. I am old enough that I remember when calculators came out.
> > They were very expensive. We were never allowed to have them in school.
> > These days they are a requirement.
> >
> > My first calculator was a solar one. It required very strong light to use
> > it. Bought another one a couple of years later that works even in dim
> > light. I still have it but it's starting to look decrepit. Still works
> > though.
>
> I just use the one on my computer

Used to have a really nice light-powered credit card-sized calculator.
Not much thicker than a credit card either. Freebie from a labware
salesperson. It's dead now and can't find another locally. Very handy at
the supermarket.