TRANSACTIONS 



OF THK 



ROYAL 

 SCOTTISH ARBORIOULTURAL SOCIETY. 



A. W. BORTHWICK, D.Sc, 



HONORARY EDITOR. 



ROBEET GALLOWAY, S.S.C, 



SECRETARY AND TREASURER. 



VOL. XXXII. 



EDINBURGH: 



PRINTED FOR THE SOCIETY. 



SOLD BY DOUGLAS «k FOULIS, CASTLE STREET. 



1918. 



