Subject Index 



691 



Virus(es) — continued 



relationship with genes 317, 319, 371, 



373 

 shell of 390 

 size of 314 

 tobacco mosaic, See Tobacco mosaic 



virus 

 transformation of types 318 

 Vision 621 

 Vitamin A 513 

 Vitamin 3i, in synthesis of cocarboxylase 



286, 287 

 Vitamin Bt^, effect on transamination 536, 



537 

 Volcanic activity 55, 56, 60, 109 



gases produced by 60, 64, 73 

 Volcanos 11-12, 13, 27 



composition of gases from 29 



in origin of moon's craters 1 1 



importance of in origin of life 169-170 



in atmosphere 57, 84, 109, no, 134 



on Mars 21, 113 



organic compounds formed from 126, 

 138 

 Water vapour, escape of 12-13, I4 



in primary atmosphere of earth 3 1 



on Venus 19, 20 

 Wheat, cj^ochrome oxidase in 565 

 Wood, composition of 92, Fig. 3 



Xanthine oxidase 471, 564 



Yeast, enzymic synthesis in 345 

 nitrogen metabolism in 548 

 ribonucleic acid in 377, 379 



Water, activated by ultraviolet light 136, 



137 

 effect of supersonic vibrations 172, 173 



Zone melting 28 



Zwitterions, interparticulate forces in 393 



Zymogen granules 456, 457 



