The physics is well understood;
the sense of inexplicable mystery
remains as strong as in Chladni's time.
The apparatus used here is descended
from the eidophone, invented by Margaret
Watts-Hughes in 1885.
"Una donna a quindici anni"
from Mozart's Così fan tutte, (1790).
Sung by Jennifer Baron.
The rise and fall of cosmical physics: notes for a history, ca. 1850-1920
by Helge Kragh
[2013/04] "In the period from about 1890 to 1915 an
interdisciplinary and unifying research programme known as
'cosmical physics' attracted much scientific and public attention.
It typically included aspects of the earth sciences (such
as magnetic storms and atmospheric electricity) combined
with astronomical subjects (such as the solar corona and
cometary tails), but there was no unanimity as to the
precise meaning of cosmical physics, which collapsed
after World War I."
Fritz Hasenöhrl and E = mc²
by Stephen P. Boughn
[European Journal of Physics 38, 262 (2013)]
Hasenöhrl, who died in the Great War, calculated
the mass of blackbody radiation; his result differed
from Einstein's famous formula. Thus began a long story
involving several famous (and infamous) names in
Twentieth-Century physics. This paper by Boughn (an
expert on the subject) concentrates on a close reading of
Hasenöhrl's original papers.