TRAiNSACTIONS 



OF THE 



ROYAL 

 SCOTTISH ARBORICULTURAL SOCIETY 



A. W. BORTHWICK, D.Sc, 



HONORARY EDITOR. 



ROBERT GALLOWAY, S.S.C, 



SECRETARY AND TREASURER. 



VOL. XXXVL 



EDINBURGH: 



PRINTED FOR THE SOCIETY. 



SOLD BY DOUGLAS & FOULIS, CASTLE STREET. 



1922. 



