14 



VIRUSES 



FIGURE 10 - CRYSTALS OF SOUTHERN BEAJT VIRUS. (W.C.Price, 

 Am. J. Bot. 43, 45 U946) ). 



FIGURE 11 - SHADOV/ED ELECTRON MICROGRAPH OF PARTICLES 

 OF SOUTHERN BEAN MOSAIC VIRUS. (W.C.Price, R.C.Williams 

 and R.W.G.Wyckoff , Arch. Biochem. 9, 175 (1946j ). 



Several animal and human disease viruses have also been obtained In reasonably- 

 pure form. These include vaccinia virus. Illustrated in Figure 12; influenza 

 virus, illustrated in Figure 13; equine encephalitis virus, rabbit papilloma 

 virus, illustrated in Figure 14; and several strains of poliomyelitis virus. 



