VI. THE SHAPE OF VIRUS PARTICLES 



81 



particles of the virus dried without salt were uniformly spheroidal, 

 though variable in size, the average diameter being about 120 mju. On 

 this finding he suggested that the true form of the virus is spheroidal, 

 the others being artefacts. Similar assumptions have been postulated 



*■ 0.3/1 



Large sized virus particles such as 

 vaccinia virus isolated from skin 

 tissues. 



Elenientary_ 

 body 



r0.2^i* Middle sized virus particles such as 

 vacdnia virus isolated from testi- 

 cles. 



2Jj^ Phage and other small size parti- 



^ cles. 



I Tailed particles. 



. ^ Thick filaments as seen with 

 5?!S influenza virus. 



Elementary 

 bundle 



ISplitted— - 

 Elementary 

 bundle 



Elementary bundle from which lipids 

 *~ "•^'" "* have been eliminated. Tobacco-mo- 

 saic virus, etc. 



Splitted elementary bundles from 

 which lipids have been eliminated. 

 Southern been mosaic, tomato bushy 

 stunt virus, etc. 





Coagulation of elementary bundle or 

 splitted elementary bundle without 

 lipid elimination. Extremely small 

 virus particles. 



Reversibly coagulable virus parti- 

 cles, such as Newcastle and polio- 

 myelitis virus. 



Fig. 11. Diagram of various shapes and sizes of virus particles. 



