The main part of the paper is concerned with a spectroheliographic study in the light of the Hydrogen H-alpha line 6562.8A and of the Calcium K line 3933.7A. A description is given of the instrumentation used to secure the observations. Some of the properties of the Sydney 18 A H-alpha birefringent filter are given in detail. A description is given of the high-resolution H-alpha filtergrams obtained with this instrument with a comparison of this description with those given by other authors. The elongated fine mottles were studied in considerable detail. All of the properties agree with those for spicules. An attempt was made to measure the spectrum of such a spicule on the disk. The hydrogen spectrum of spicules was computed under non-local thermodynamic equilibrium conditions for the Lyman alpha, beta and gamma lines, the Balmer alpha and beta lines, and the Paschen alpha line. The appearance of the K spectroheliograms are described. Attention is drawn to the equality in birth rates for granules and spicules within the K flocculi, which indicates a physical relationship.
Environmental Research Papers,
Doctoral thesis. Legibility of this document is in part unsatisfactory. Reproduction has been made from best available copy.