Lightning and Atmospherics

IN NATURE of August 15, on p. 278, I notice a paragraph dealing with atmospherics produced by lightning discharges. From my own observations, I would express the opinion that the statements made in that paragraph only represent a part of the complete picture. There are so many different kinds of atmospherics observed both aurally in radio receivers and visually when they are recorded as by means of cathode ray oscillographs, that a complete generalization in such simple terms as are there expressed is scarcely possible.