Formula's (fwd)

---------- Forwarded message ----------
Date: Sat, 11 Jul 1998 00:19:55 -0500
From: Shaun <shaunobrien-at-geocities-dot-com>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Formula's

    Anyone happen to have the formula for finding the inductance
of a cone primary? I saw it once before but I don't remember where.
Also I can't remember how to find the length of a sprial. I also need
to find the length for the primary.