TRANSACTIONS 



OF IHE 



ROYAL 

 SCOTTISH ARBORICULTURAL SOCIETY. 



A. W. BORTHWICK, D.Sc, 



HONORARY EDITOR. 



EGBERT GALLOWAY, S.S.C., 



SECRETARY AND TREASURER. 



VOL. XXXI. 



E LH N B U R G H : 



PRINTED FOR THE SOCIETY. 



SOLD BY DOUGLAS & FOULIS, CASTLE STREET. 



1917. 



LIBRARY NEW YORK BOTA?4ICAL GARDEN; 



