When a not-very-tall female friend (about 5' nothing) asked me for help finding a road bike that fit her, I got curious with the Georgena Terry story.
I eventually secured 2 models. and I am still trying to figure out, completely, how her designs work.

One is a classic GT with the mixed 24x700c wheels. a 24" front wheel. It measures 44cm ST X 47.5cm TT c-c)
and that one I kind of get (I think). the small front wheel allows a decent length headtube (107mm) which in turn allowed her to still fit a rather short toptube (in this case, about 47.5cm. the shortest TT I think you can fit onto a frame with full 700c wheels is about 52cm. So, that's a savings of 2 inches of reach)

but the other one, the blue Symmetry, baffles me a bit.
it's a big frame 56cmST (c-c) and has two 650c wheels.
so what's the design point here? maybe that even a tall women (I figure a 56cm frame would suit someone about 5'10") would still want a shorter toptube? and the 650 wheels allow that? (this one has a 51cm TT which is unheard of I think for a standard wheeled bike.)

But why did some Symmetries have the small 24" wheel while this one has 2 matching 650 wheels?