Abstract
At the time of the 1952 eclipse a small, rather faint, prominence was located near the equator on the west solar limb. Redman and Zanstra (1952) have previously discussed the continuous spectrum of this prominence, and in this paper we discuss the line spectrum. By combining the line data with the continuum data, we arrive at the following conclusions: (1) the optical thickness of the central part of the prominence in the center of Ha is less than or near unity, and none of the observed hydrogen- and heliumline intensities are seriously affected by self-absorption; (2) the hydrogen energy levels and the helium triplet energy levels are overpopulated relative to the thermodynamic equilibrium populations at T4 (3) helium is predominantly singly ionized; (4) T is near 20000 and fle >- 1011; and (5) the prominence is in a steady state, with its radiated energy balanced by an external energy supply.
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