Forty two years counting spots: solar
observations by D. E. Hadden during 1890-1931 revisited
by V. M. S. Carrasco et al.
[2013/05] "We have recovered the sunspot observations
made by David E. Hadden during 1890-1931 from Alta, Iowa.
We have digitized the available data published by Hadden
in different astronomical journals. This data series [has]
been analyzed and compared with the standard sunspot number
series. Moreover, we provide additional information on two
great sunspot groups, previously not described, that
originated two important extreme episodes of space weather
on February 1892 and September 1898."
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."
Electrical pioneer, feminist educator,
saviour of many lives in the trenches of the Western Front:
not a person in the eyes of the law, however,
and therefore denied election to the Royal Society.