ABSTRACTS OF TF.CIIXICAL ARTICLES 247 



showers the ionizuig effect does not appear to he negligible compared 

 with that due to other ionizing agencies occurring at night. 



A meteor of one-gram mass or greater will produce, on the above 

 assumptions, sufficient ionization to affect propagation. One explan- 

 ation of the general turbulent condition of the ionized layers may be 

 provided by the continuous bombardment of meteors. 



