Abstract
Pseudomonas phaseolicola cells synchronously infected with 6 were fixed and embedded by several procedures. The diameter of 6 measured 75 nm and its nucleocapsid 60 nm. Virus nucleocapsids were icosahedral and surrounded by a double membrane. In planar sections the nucleic acid appeared as a hexagonal ring and in cross sections as two angular structures.
* W.G.L. is a member of the United States Department of Agriculture, Agricultural Research Service.