It may be your ignorance of English but this seems rather inane.
You may be saying that the ADG at "ground zero" subtracted from the ADG at "ground zero" is zero. That is trivially true.
You may be saying that the ADG at "ground zero" subtracted from the ADG at "ground zero" within the mass is zero. That is trivially false because
What I am saying is that;
I guess we all believe the COG must be somewhere.
We probably all agree that there is really no upwards pull in that building
Paul is right, - if a big Jupiter that would pass by close to the earth and let's say exert a pull on the Earth of 100µGal , - that would cause the gravimeter (at a 1 meter table), to measure a relative difference (between the Ground Floor and the table) of Minus 308 µGal + Minus 100µGal = Minus 408 µGal ( not only minus 208 µGal as I wrote yesterday).
This demonstrate a principle that also should apply for the lower parts of the building Domus Vista. - But it doesn’t.
The reason is that the COG must relocate when the building is standing on the Earth, - we have discussed that before.
It is a question of unification between 2 bodies, and what then happens inside the bodies.
The COG cannot be at Ground Floor or any of the other floors, because if so it should be revealed by upwards pull, exactly like the visiting Jupiter planet passing close by the Earth.
So where can the COG possible be?
Upwards or downwards pull must show us the direction where to find it.
Every floor in Domus Vista seems to point to the cellar / foundation.
There are no other possibilities.
Regarding the question exactly what is the value in the COG ?
Well it is a little hypnotic. The COG is most likely somewhere near the foundation under the cellar.
I am too lazy to consider what the ADG-value possible could be.
But if it is X without the building, that place, it is also X after the building is finish...Otherwise it would not be a COG.
This should answer the question..
The ADG values on different floors, depend of the excact mass / FAG..
- you have not done the measurement and
- moving within the mass will plas more mass above the ionstrument and change the measured ADG.
There will always be some deviation when measuring.
But let us say we expect a upwards pull of 200µGal and we only measure zero +/-20 µGal, - I think this is acceptable to get rid of the old thesis.
Later more exact measurement certainly can confirm this.
If the COG really is hiding beneath the cellar I think the FAG is about 306µGal beyond that building.
The reason to that the 3 lower floors shows much stronger ADG, is probably not only that these are heavier, but also the shorter distance to the COG beneath the cellar.
I can see no other possible pattern like that.
And yes I think we all (sooner or later) are surprised. (Except Mother Cow of course)...