Caps in series

[Erthwin-at-aol-dot-com (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

I know that if I wire two 5Kv .01uF capacitors in series I'll end up with a 
10Kv .005uF cap but what happens when I put in a third capacitor that has the 
same ratings? does the uF rating drop by half again (15Kv .0025) or is it 1/3 
of the original rating now (15Kv .00333~)...or is there a completely 
different set of equations for finding this out? I ask this because I'm 
planning on looking for some smaller voltage caps to wire in series and from 
the other visits I've made to my local surplus I doubt I'll find anything 
close to what I actually need so I might end up wiring a LOT of caps in 
parallel and in series to get the values I'm looking for.

Left, left I hadda good brain but it left...
---Daniel