On 3-Nov-2003, Wes Stewart wrote:
....
Whatever we were doing required the use of a "magic" T. I, the ever
inquisitive student, asked; "Doc, how does a magic T work?"

Doc, former professor and the author of "Intermediate Mathematics of
Electromagnetics", replied,

"It's magic."

In the US Navy, we usually explained that such devices worked on the principle of
PFM. First word is Pure, Last word is Magic

-ken-