328 SOME RECENT RESEARCHES IN PLANT PHYSIOLOGY 



Tannin as inhibitor of diastase, 5 

 of oxidase, 230, 236 



in leaves, 275-277, 281 



oxidation of, 300, 301 

 Template method of Sachs, 3 



as modified by Thoday, 4 

 Toluene : 



effect on inhibitor, 232, 267 



on permeability, 86 

 Tropism, photo-, 134, 185 



thermo-, 131, 133 



Vacuole: 



contractile, 84 



surface of, 104 

 Viscosity of pectin solutions, 68-73 



Wood: 



areas of elements, 208-211 

 carbohydrates of, 187-208 

 functions of, 186-215 

 medullary rays of, 211-213 

 structural changes in, 184 

 tracheids of, 207-210 

 vessels of, 207-210 



Xanthones, 251, 268 



Yeast, 45, 86-96 

 maltase free, 45 



Zymogens, 218 



THE END 



IILLING AND SONS, LTD., PRINTERS, GUILDFORD, ENGLAND. 



