A Preliminary Study of the Extreme Ultraviolet Spectroheliograms from Skylab

Some of the first observations obtained with the Naval Research Laboratory's Extreme Ultraviolet Spectrograph (S082A) during the first Skylab mission are presented and compared with magnetograms and other ground-based data. The instrument is a slitless objective-type grating spectrograph covering 170-630 Å and described in Solar Phys.27, 251 (1972). Chromospheric network, loop prominences, active regions, a flare, limb brightening, XUV bright points, and `coronal holes' are among the phenomena shown and discussed.