Quoting Chuck Harris <[EMAIL PROTECTED]>, on Tue 29 Jul 2008 07:05:10 PM PDT:
> According to Donald DeCarle's Watch and Clock Encyclopedia: > > Clepsydra- Water Clock. There are various types of water > <snip> I should note that because the flow is a function of the viscosity of the working fluid, the clepsydra has a very nonlinear temperature coefficient (with a saturation at around 0C and another saturation at around 100C, if the working fluid is water, depending on the atmospheric pressure) although this can be compensated to a certain extent by changing fluids.. Is a clepsydra using, say, alcohol or fluorinert(tm) still a clepsydra? I wonder if one could make a temperature compensated one (where the orifice size changes with temperature.. much like building a temperature compensated pendulum using metals with two different CTE) There are various forms with tipping bucket (like rain gages) that one might be able to make a calendar with (raising the prospect of actually having a leak second) _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
