Vol. VII JULY, 1920 No 7. 
L. . ■ . , ■ ' . ■■'■r a 
AMERICAN 
JOURNAL OF BOTANY 
OFFICIAL PUBLICATION OF THE 
BOTANICAL SOCIETY OF AMERICA 
CONTENTS 
Measurement of the catalytic power of catalase 
L. G. M. Baas Becking and H. C. Hampton 261 
Early stages in the development of certain Pachypsylla galls on Celtis 
B. W. Wells 275 
The upward translocation of foods in woody plants. II. Is there normally 
an upward transfer of storage foods from the roots or trunk to the grow- 
ing shoots? ........ . . . Otis Curtis 286 
Early stages in the development of the sporophyte of Sphagnum subsecundum 
Geo. S. Bryan 296 
PUBLISHED 
IN COOPERATION WITH THE BOTANICAL SOCIETY OF AMERICA 
At 41 North Queen Street, Lancaster, Pa 
BY THE 
BROOKLYN BOTANIC GARDEN 
Brooklyn, N. Y. 
Entered as lacond-class matter February 21, 1914, at the post office at Lancaster, Pennsylrania, 
under th« act of March 3, 1879 
