[time-nuts] gravity controlled pendulumn clock?

[Don Latham]

yes, but 4 rods in the RSF system...
Reeves Paul
> But it is 1 chain, (22 yards), surely? And you admitted that is not 20m
> when
> laid out properly. The laws of cricket have not changed (even if they
> give a
> metric equivalent) just because we might have joined the EU!! I have no
> objection to using a metric measure to do it but you have to use a
> non-integer value - and do the conversion. Not very elegant. So if tape
> measures with joint metric/imperial markings are available - and they
> are -
> why not use the correct measure in the first place?
> As to the definition of the inch it works both ways - why have 25.4
> subdivisions of an arbitrary length to equal one inch. Just use an inch
> -
> it's no less valid and the yard/metre can both be defined in exactly the
> same way as so-and-so many wavelengths of Kr86 light. As I said, it's
> just
> that the internal standards conversions in the 'metric' system are
> easier.
> Just nit-picking, really. I use both systems happily as, I suspect, most
> people of my age do, depending on circumstance.
>
> Paul Reeves      G8GJA
>
>
> -----Original Message-----
> From: Jim Palfreyman [mailto:jim77742 at gmail.com]
> Sent: 14 December 2011 11:23
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] gravity controlled pendulumn clock?
>
> Paul, a cricket pitch is 20 m. Sure when the curator draws the lines it
> is
> 12cm longer, (and I guarantee s/he uses a metric measure) but when we
> pace
> it out for backyard cricket - its 20 m.
>
> Also my American friends, all your imperial measurements are DEFINED in
> terms of metric. eg your inch is 25.4 mm exactly. By definition. It has
> been
> estimated you could save a trillion dollars a year in your economy by
> converting - which you will ultimately do. I just hope it is in my
> lifetime.
>
> On Wednesday, 14 December 2011, Reeves Paul
> <Paul.Reeves at uk.thalesgroup.com>
> wrote:
>> Oh dear, what have I helped to get going :-) It has certainly been
>> interesting reading! My point was, as Chuck notes, that the metre,
> kilogram
>> etc. are no more 'precise' than a yard, pound etc. being, essentially,
>> arbitrary units and the 'imperial' units can be defined just as
>> accurately and in the same way. I will certainly concede that things
>> become 'interesting' when converting between different units outside
>> of the 'metric' system (and the 'metric' system went through several
>> versions
> -with
>> distinctly odd units - before the current standardised one) but that
>> just relates to my comment on the reduction of mental arithmetic
>> abilities nowadays as against simple decimal point shifting......
>> I'm not sure I would agree on being 'forced' to take on certain
> measurements
>> - we are a lot closer to Europe (sort of...), after all - but pints,
> inches
>> and miles do seem more 'natural' (a litre is just too much beer) and
>> you could never measure a cricket pitch in metres!
>> That's all from me,
>>
>> Paul Reeves     G8GJA
>>
>>
>>
>> -----Original Message-----
>> From: Chuck Harris [mailto:cfharris at erols.com]
>> Sent: 14 December 2011 02:05
>> To: Discussion of precise time and frequency measurement
>> Subject: Re: [time-nuts] gravity controlled pendulumn clock?
>>
>> Arnold Tibus wrote:
>>> I don't understand at all the arguments against the metric system and
>>> the polemic remarks about. I second the statements of Neville and
>>> Jim.
>>>
>>> Without these intelligent french Astronomers like
>>> Jean-Baptiste-Joseph Delambre, Pierre-François-André Méchain and J.J.
> Lalande (more infos:
>>> Ken Alder, The Measure of All Things), we would still have the severe
>>> problems they had centuries ago!
>>>
>>> Reading WIKIPEDIA, http://en.wikipedia.org
>>> /wiki/German_units_of_measurement,
>>> we find a good example of weird units (just for only a part of
>>> Germany):
>>>
>>> "Before the introduction of the metric system in Germany, almost
>>> every town had its own definitions of the units shown below, and
>>> supposedly by 1810, in Baden alone, there were 112 different
>>> standards for the Elle around Germany. The metric system was a
>>> much-needed standardisation in Germany."
>>>
>>> This was not only a german problem, and we still have today some
>>> problems in the world in this area.
>>
>> Standardization is fine.  Attempting to force the world's largest
>> economy
> to
>> bend to the wishes of Europe isn't fine.  The US system has been
>> standardized for more than a century, and works very nicely.  Decimal
>> inches, decimal pounds, and seconds is every bit as valid a
>> measurement system as the equally arbitrary meter, kilogram and
>> second.  Decimal
> inches,
>> decimal pounds, and seconds flies most of the airframes in the world,
>> won WWII, and took mankind to the moon and beyond.
>>
>> Saying that the use of pounds, and yards is imprecise is simply
>> ignorant.
>>
>>>
>>> I believe we should think more about what we are saying and doing, so
>>> we would do a big step forward to become a world community. ...
>>
>> Regardless of our measurement systems, we are already a world
>> community.
>>
>> The strife we see in the world today is not the result of
>> measurements,
> but
>> rather is the result of religion, politics, and culture.
>>
>> -Chuck Harris
>>
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Dr. Don Latham AJ7LL
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