diodes (small signal type) and a straight wire connection
show no significant difference.
There is one demonstration that Minto performed that
I have not yet been able to directly replicate. He showed
that the conductivity of a 5% sucrose solution varied
significantly with frequency; peaks and valleys showed on
a chart recorder. I've tried this several times without
success. However, since Minto's equipment was secret, it's
impossible to determine if he was seeing a real phenomenon or if it was just a bad experiment.
The Future of Polar
Polar conductivity seems to be an area where very little
research is being done. This means that there is a potential
for novel discoveries and applications. Expensive or sophisticated equipment is not needed to explore these effects at
this time. Therefore, enterprising experimenters and hobbyists could — quite possibly — make significant contributions
and breakthroughs. Let's look at some areas of application.
Proximity Chemical Analysis. This is an area that I
am currently researching whenever I get the time (which
isn't all that often). Take a test tube of some solution and
place it between a force emitter and sensor. Measure the
conductivity with metal attachments to the outside of the
test tube. Different solutions have different conductivities.
Currently, I can easily discriminate between saturated
solutions of table salt, sucrose (cane/table sugar),
dextrose (glucose/blood sugar), plain water, and cooking
oil. It's important to note that the test tubes are closed and
that these measurements are made without touching the
liquids. In theory, this means that it could be possible to
measure someone's blood sugar level or blood alcohol
content (and perhaps other things) simply by placing the
person’s hand on an electronic device.
Underwater or Underground Communication.
The Navy communicates with submarines with a huge,
land-based, low frequency transmitter. It doesn't penetrate
very deeply into the water, so the submarines must be fairly shallow to receive it. Since the transmission facilities are
so big, the submarines can't directly respond. They have to
surface and transmit with more conventional equipment.
Minto demonstrated point-to-point, wireless communication from dockside to a scuba diver in the water. It seems
reasonable to suggest that polar conductivity through the
ground is also possible.
Medical Applications. The seed germination
experiment (last month) seems to be quite notable. It was a
well-controlled experiment in an academic setting. It sug-
NUTS & VOLTS
Circle #43 on the Reader Service Card.