Brian, you're a difficult person to locate sometimes so I apologise for addressing you in some of your recent NGs.
Recently, over in uk.radio.amateur you said that the fundamental law of electromagnetics, the Law of Biot and Savart, was derived from Laplace's Equation which seems to be concerned with electrostatic potential.
This did not seem at all correct to me, so I challenged you to either admit your mistake or else to cite an authoritive URL to support what you claim, but your repeated response has been to resort again and again to offensive personal remarks.
In the interests of your own reputation, and that of the Radio Society of Great Britain upon whose technical committee you are a member, would you please either retract decently or provide authority for your assertion but with the complete absence of gratuitous abuse?