[en] Areas of network emission features in CII lambda 1135, C III lambda 977, O IV lambda 544 and O VI lambda 1032 were measured in and out of coronal holes. In the quiet Sun these areas, on the average, showed a 20% increase between C II and O VI. In the coronal holes there was no significant average variation, but a number of the features showed an interesting decrease in area at intermediate temperatures. (Auth.)