Richard Clark wrote:

Hi OM,

As stated previously:

"Fig. 6 shows the actual current in the earth for the same conditions"

I hope the word "actual" is not subject to recourse to the IEEE
dictionary for clarification.

I agree with Richard Fry. All the references to ground conductivity,
including Figure 6, are in Part II, the (erroneous) theoretical
treatment. As for the "actual", look back a page, to page 759, at the
bottom, where they say, "Thus from [equations] (8), (9), and (10),
together with Fig. 4 ["Calculated Values of Total Earth Current"], we
may obtain the actual current in the earth and the current in the
wires." So the "actual" current is calculated from three equations and a
graph of calculated current. Whatever they might have meant by "actual",
it doesn't mean that it was measured.

The "same conditions" are explicitly specified with conductivity.

One has to trust that engineers did not ask the farmer's wife to make
this determination for them in her kitchen. The imputation of
distrust would seem to serve another agenda.

Figures 7, 8, 9, and 10 also are all quite explicit.

They are also part of the theoretical treatment and don't represent
measured values. Measured values begin with Fig. 25.

. . .

Brown, Lewis, and Epstein did a good and careful job of measurement.
Please be careful not to confuse their not-so-good theoretical treatment
with their measurement results.

Roy Lewallen, W7EL