In further confirmation are some experiments made by Fritz Gize in 1934,
as described by Kalgren (1995). He made the
convection currents more easily visible by projection on a
transparent screen. If the subject (unclothed) is engaged in
intellectual work, the maximum radiation moves towards the head,
while radiation from the lower part of the body almost
disappears. During intense intellectual concentration, as in mental
arithmetic or learning by heart, the maximum heat
appears in the midline between the eyes and upper boundary of the
forehead.
If an emotional note is introduced into the mind, the radiation from
the head decreases while that of the abdomen
immediately starts again. It becomes especially strong in the
thorax, where it takes on a distinct character, which differs
from the head radiation in the presence of rhythmic, spurting
impulses of heat waves.
When the person's mind is engaged in strong mind activity his whole
body emits enhanced heat. In this case the
abdominal zones are often found in a special state, with little
waves rising very brightly and rapidly. These average three
times faster moving waves than in the case of the emotional contents
of a mind. These heat waves can be detected as
much as 2-3 metres above a man.
Besides this convection-field, it is now clear that a living
organism has a very complex radiation-field. This field occupies
a wide range of the electromagnetic spectrum from ultra-violet
(about 1015 Hz) down to extra-low frequencies of a few
Hertz or lower. At this lower end are found the electrical waves
from the brain and heart, which can be detected with
conventional electrical instruments. At the upper end visible,
ultraviolet and near infra-red radiations have been
detected with the use of the sensitive photon counter. Between these
two extremes lies a huge region of the spectrum,
encompassing some 1013 orders of magnitude, going from radio and
microwaves at the lower end to far infra-red at the
upper end of frequency. Much less is known of these radiations since
they are very hard to detect and characterise.
Nevertheless there are good reasons to think that radiations
throughout this band are significant for the organism and
contribute to its field.