RE: Spheres vs Toriods

I was interested to read this regarding Wardenclyffe... 

RH> It is interesting to note that I and a number of others believe
RH> that Tesla was to have the coil within the top terminal, itself!!!
RH> With this being the case the "oblate" was a good shape for this
RH> system.  The toroid is best for a coil which lies outside of the
RH> terminal.

It appears from this that he was in the process of turning the open 
resonator into a cavity resonator (Y-N)?