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The Director's Quarterly Report 1956-1
The Director's Quarterly Report 1956-4
The Director's Quarterly Report 1956-2
Photograph, Climax Domes
Photograph, HAO Picnic
Photograph, Small Dome
Photograph, Holiday Party
Jim Axtell and Gerard Wlerick at K-Coronameter (Mark I)
Plans for the calibration of the X-coronameter
The problem of coronal ionization
Outline of thesis problem
Indirect measurement of solar energy variations in the extreme ultraviolet and x-ray region
Report on research in progress
Outline of thesis problem
Temperature gradients in the chronosphere; Some characteristics of a chromospheric model; A model of the chromosphere from the helium and continuum emissions
Magnetic intensification on the sunspot spectra
List of M-region storms October 1951 to date
Measurements of solar granulation. Instrumental effects due to the microphotometer and to the photographic printing
Photographic photometry of the coronal emission lines
Comments on solar granulation research

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