
In
1759 it has demonstrated that the effects of the bottle of Leida could
be obtained also with simple metallic armors, separated from
an
insulator (dielectric), the air
as an example.
How much is thinner the thickness of the dielectric  to parity of
other conditions  much greater one is accumulates
it of
electricity. It applied for first the mathematics to the
electromagnetic theories, and introduced in the scientific world the
concept of the numbers denied to you.
It more studies moreover the insulating materials in way much taken
care of than how much fact from Gray, establishing the specific
conductivity, that is the power of transmission of the electricity,
many materials. In 1759 its main work "Tentamen theoriae
electricitatis always appears magnetisms", in which it tries to
apply, in systematic way, the mathematics to the electro
logy,
being based on the theory electrical worker of Franklin. Even if today
the work of Aepinus appears little value, it has the great merit to
indicate to the students of the time the possibility to apply to the
mathematical calculation to the phenomena magnetic and electrical. 
 
