[LEAPSECS] props for talks?

[Eric Fort]

  Forgot and left off the promised references, here they are:

https://en.wikipedia.org/wiki/Time
https://en.wikipedia.org/wiki/Timeline_of_time_measurement_technology
https://en.wikipedia.org/wiki/History_of_timekeeping_devices
https://en.wikipedia.org/wiki/Clock
https://en.wikipedia.org/wiki/Day

All of the above look pretty good to me, though a bit of peer review by
this group (many being experts in the field) could probably make them even
better.

Eric

On Tue, Apr 3, 2012 at 1:40 PM, Eric Fort <eric.fort at gmail.com> wrote:


> Somewhat depends upon the intended audience but the following items

> come to mind and I'll finish with 2 references from which to pick

> more.  The props chosen might also depend somewhat at to what "the

> presented philosophy of what time is" is.

>

> Here's a few things that come to mind:

>

> Various calendars (Myan, Hebrew, Julian, Gregorian, etc. illustrating

> their significance <and making a joke or 2 about the "end of time"

> according to the myan long count coming soon)

> .

> Telescope/transit/sextant - translate where you are to when it is.

>

> Rubidium Oscilator (a cesium beam is probably a bit big to take along

> but a modern rubidium easily fits in a suitcase)

>

> WWV/WWVH audio recievers WWVB and gps recievers with display

> (time/frequency transfer methods & radio controlled clocks)

>

> finished and unfinished quartz crystals.

>

> marine chronometer

>

> pendulum (could be as simple as a mass on a string, variable length

> being nice as one can observe how the period changes with length <and

> with variation in g should you be able to arrange such ;) > )

>

> heliometer

>

> pocket watch

>

> clepsydra (aka water clock)

>

> candles

>

> Hourglass

>

> sundial

>

> tally stick (used for the counting of days)

>

> Eric

>

> On Tue, Apr 3, 2012 at 10:59 AM, Rob Seaman <seaman at noao.edu> wrote:

> >

> > I'm giving a colloquium in a couple of weeks and would welcome

> suggestions for neat timekeeping gizmos (borrowed or bought) to spark

> interest.

> >

> > Rob

> >

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>

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