"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.