THE 
BoTANICAL GAZETTE 
July roro 
Editor: JOHN M. COULTER 
CONTENTS 
Ratio of Phosphate, Nitrate, and Potassium on Absorp- 
tion and Growth Oswald Schreiner and Jf. J. Skinner 
Contributions to the Life History of Widdringtonia 
cupressoides W. T. Saxton 
Some Peculiar Fern Prothallia Lula Pace 
Periodicity in Dictyota at Naples I. F. Lewis 
Current Literature 
The University of Chicago Press. - — 
CHICAGO and NEW YORE = 
William Wesley and Son, London 
