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The Director's Report
Summary of status of Thomas' work on statistically steady state computations
A model of the electron corona with reference to radio observations
Brondened H? absorption lines spectra, 14 May 1951
[Emission line corona]
Heisenberg's theory of isotropic turbulence in inhomogeneous turbulence fields
Flare of 13 December 1957
Solar flare classification
Flare activity index
Relation between K-coronal intensity maxima and geomagnetic disturbance
Temperature gradients in the chronosphere; Some characteristics of a chromospheric model; A model of the chromosphere from the helium and continuum emissions
A hypothesis for the origin of solar flares
Solar prominences and geomagnetic disturbance
Measurements of solar granulation. Instrumental effects due to the microphotometer and to the photographic printing
The role of active solar regions in the formation of magnetic storms
On the enhancement of certain helium lines in the limb flare of 24 June 1956
Correction of coronal emission line profiles for instrumental broadening
A note on the geomagnetic variations following the solar flare and cosmic ray effects of 23 February 1956
Coronal emission in the yellow line region of 20 April 1956
Recent auroras seen in Japan

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