With this introduction the author then goes into a long, detailed, technical discussion of gravity. He contrasts the theories of “attraction” and “pressure”.
Euler and other scientists believed that the universe was filled with low
density material called “ether” (among other things) which exert pressure on
bodies of higher density, and that the attraction observed between these
bodies could be caused by shielding of this pressure in the space between
the bodies. Many inconsistencies with the accepted Newtonian laws are noted.
Inside Newton’s formula
is G. G is the “universal gravitational constant”. It is assumed – and
assumed is the correct word here – that each mass of M exerts the same force
of F regardless of where in the universe it may be placed. It is also
assumed that each mass of M exerts the same force F whether it lies on the
surface of the Earth or whether it be deep inside the Earth. When using the
Cavendish balance to determine the mass of the Earth, it is assumed that
each particle exerts a fixed force upon all others. But if Van Flandern’s
ideas turn out to be right, then particles near the surface of a planet
might exert a force greater than those deep down. The key to all of our
gravity is the mass of the Earth. If the mass of the Earth is
wrong, then so
are our estimates for those of other bodies. If the mass of the Earth has
been overstated, then it follows that the masses of all other bodies in the
solar system have also been overstated. If the Earth is hollow, then so too
is every other planet in the solar system.
There are four basic forces which are believed to represent all physical interaction in nature. They are:
A. H. Cook from the Cavendish Laboratory in England admits that gravitational experiments, even in laboratories, are fraught with danger:
How can we be sure that the Earth really has the mass accorded it by
Newtonian gravity? Is an experiment, using two lead balls really
representative of the entire Earth? How can we be sure that gravity behaves
1,000 miles down in the Earth the same as it does 10 cm down in a lead ball?
Scientists are convinced that electric currents flow inside the Earth. These
currents almost certainly flow in the same direction. It therefore follows
that they will be attractive. Does it not then follow that each mass of M
deep inside the Earth might produce a greater force of F than previously
considered? If so, then the Earth’s density may be much less than it has
been thought of until now. Over and above this theorizing, we still have the
excellent mine, borehole, ice-cap and sea bed experiments which definitely
show that something is amiss. Regardless of where G was determined, the
value of G increased, even at very shallow depths. All this indicates that
less mass produced increased attraction. These could be the initial
indications that Earth really is hollow.