[paul cotter (OP)]

A tenured professor of electrical engineering in  Germany applies ∇Χ∇Χ to the electric field, E and arrives at the following vector identity: grad div E -∇sqE. He then states that the term grad div E represents the "scalar wave" and proceeds to sell expensive but basic kits that supposedly demonstrate these "scalar waves". However div E=0 in a charge free zone( ie free space ) so grad0 is also 0. This individual also states that an ice can be run on water as fuel if ozone is added. I am dumbfounded. PS I apologise for alternating between the del operator and grad, div as I cannot get consistent use of symbols on this computer/operating system.

[Zer0]

It That Gentleman still in Business?
(Current Professor or long retired)

Are We referring to a considerably Old Senior Citizen?