Reply to the paper

Leblanc and de la Noë used the set of data published by Mercier and Rosenberg (1974) on the type III burst at 169 MHz. They conclude that type III bursts are associated with low density coronal structures and occur in low density regions.We show that their methods cannot lead to firm conclusions; we point out some inconsistencies in their results.     

Reply to Aikin and Underwood

A list of continuum windows in umbral spectra is given and briefly discussed.     

Reply

A previous study of non-axisymmetric eigenmodes in a simple model plasmasphere is extended to a case in which the Alfvén speed varies across the magnetic field lines. An approximate ordinary differential equation is derived, and this contains a logarithmic singularity closely analagous to a result obtain by Tamao (1965). The singularity is found to lie close to the resonant lines of force for a hypothetical torsional oscillation. Some valid eigenfrequencies are stated for a region with appropriate further boundaries.