VIRUSES AS MOLECULES 



15 



FIGURE 12 - SHADOWED ELECTRON MICROGRAPH OP VACCIFIA 

 VIRUS. (D.G.Sharp et.al., Proc . Soc . Exp. Biol. & Med. 

 61, 2?9 (1946J ). 



FIGURE 13 - SHADOV.'ED ELECTRON MICROGRAPH OP INFLUENZA 

 VIRUS. (R.C.Williams and R.w.G. Wyckoff, Proc. Soc. Jfixp. 

 Biol. &Med. 58, 265 (I945) ). 



FIGURE 14 - SHADOWED ELECTRON LIICROGRAPH Ot' RABBIT 

 PAPPILOMA VIRUS. (D.G.Sharp et.al. Proc. Soc. i:;xp. Uiol. 

 & Med. 61, 259 1194?; ). 



Bacteriophage or bacterial viruses have also been isolated in pure form, 

 electron micrograph is shown in Figure 1?. 



An 



