[time-nuts] Clock Calibration

[Brooke Clarke]

Hi Perrier:

When was this?
Do you have a URL?

Have Fun,

Brooke Clarke
http://www.PRC68.com


Perry Sandeen wrote:
> List,
>
> I was reading some of the history of mechanical clocks and was astonished to see that one guaranteed its accuracy to 2 milliseconds per day! (And it was) Now this same clock when tested with modern equipment tested to be accurate to 200 micro-seconds per day.  Astonishing!
>
> This got to wondering how the heck they were able to calibrate a clock to milliseconds per day back then?
>
> And as extension to that question, how do they prove the accuracy of F1 or other similar time standards?
>
> Regards,
>
> Perrier
>
>
>
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>
>