Re: [APD] Temperature, Thermometers & Mercury

[Phillip Grobler <pfgrobler at gmail_com>]

I don't know about the rivers in the Amazon or other tropical areas.

But the rivers, dams, lakes and tropical seas that I've swam in almost
all had fairly strong
thermal streams and layers that differ quite a bit in temperature.

Enough that the water feels either nice and warm or definitely cold.
Its definitely more than
2 degrees C.

I can not see that a temp changes that is short lived would have any
negative effect.

Just my thoughts.

I've swam in Lake Malawi, Red sea, Vaal river, Vaal dam, Orange River,
 warm currents  in the Indian ocean.








On 6/30/05, Raj <ggrk at blr_vsnl.net.in> wrote:
> 
> Our sense of touch is very good at comparing. When we
> try to blindly asses the temperature it can be way off.
> Once a reference is established, one can tell easily compare
> establishing whether the water is warmer or cooler and also
> to a certain degree by how much.
> 
> After some months of daily lab work I could tell quite accurately
> but an error could spoil my film so I always checked with a
> thermometer.
> 
> Raj
> 
> >If one is using no other measurement than one's sense of
> >touch, how does one know that it is accurate at assessing
> >temperature on any given occassion?
> >
> >Or is it just, as many of us suppose, that "accurate
> >enough" for aquatic hobby purposes is a pretty broad range?
> >
> >
> >sh
> >--- Raj <ggrk at blr_vsnl.net.in> wrote:
> >
> >
> > >
> > >          While developing my own slide films in the old
> > > days I could quite
> > > accurately tell temperature by dipping a finger in the
> > > water bath. Even now
> > > I compare my various tanks with touch and feel
> > > temperature assessment.
> > >
> 
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-- 
Phillip Grobler

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