2l6 



INDEX 



Unger, 1, 26 



Ursprung, 54, 5C, 80, 115 



Vapour blocking lumina, 41 ff 

 Influence on transpiration of, 9 ff 

 Water transmitted as, 42 ff 

 Vesque, 29, 46, 54, 56, 80 

 Vital actions in transpiration, 7 ff 



lifting water in stems, Assumed, 



47 tf 

 lifting water in stems, looked for, 

 69 ff 

 Vital theories, 47, 54 



Evidence from structure regarding, 

 51 



Walls of cells, Breaking strength of, 

 198 ff 



of tracheae, Resistance of, to moving 

 water, 95, 96 



of trachea, thickenings on, 96 

 Weber, 54, 55, 80 

 Weinzierl, 198 

 Weslermaier, 48, 80 

 Wilting of leaves indicating changes in 



water tracts, 54, 56, 57, 62 ff 

 Wolff, 27 

 Wood-sap, Concentration of, 39, 45, 58 



extracted by centrifuge, 44, 57 

 Wood, Section of elements in, 52 

 Worthington, 115 



R. CLAT AND SONS, LTD., BRUNSWICK ST., STAMFORD ST., S.E., AND BUNGAY, SUFFOLK. 



