I found that there are three types of ohms or were. I am curious if the difference was just an apparatus differential or was there some other story to it.

There are B.A. Ohms, or British Association of Advanced Science. The B.A. ohm is equal to 0.98651 International ohms.

I.S. Ohms, or International Standard Ohms are equal to 1.01367 B.A. ohms.

Siemens ohms are equal to 0.98651 international ohms.

Here are two links about it.

http://www.sizes.com/units/ohm.htm
http://en.wikipedia.org/wiki/Siemen
It seems to have flip flopped around a bit. I have other information as well.

Today some equipment measures in Siemen ohms and some equipment is in International ohms.

Here is a meter that is calibrated in Siemens.

http://www.trifield.com/HighResistance.htm
Sincerely,

William McCormick