No. 4 
Editor: JOHN M. COULTER 
CONTENTS 
tion of Soil Moisture to Desert #Vegetation 
Burton Edward Livingston 
wet of Longitudinal Compression upon the Pro- 
duction of Mechanical Tissue in Stems 1. H- Pennington 
North American Species of Stereocaulon 
mi Lincoln Ware Riddle 
smavran Wilber Berry 
te University of Chicago Press 
- CHICAGO, ILLINOIS — oe 
William leigh and Son, London - 
