D7. 





TRANSPIRATION AND 



THE ASCENT OF SAP 



IN PLANTS 



BY 



HENRY H. DIXON, Sc.D., F.R.S. 



University Professor of Botany in Trinity College, Dublin ; Director of 

 Trinity College Botanic Gardens 



MACMILLAN AND CO., LIMITED 

 ST. MARTIN'S STREET, LONDON 



W 1914 



