AMERICAN 
OFFICIAL PUBLICATION OF THE 
BOTANICAL SOCIETY OF AME 
CONTENTS 
Australasian botanical notes III. New Zealand. Douglas Houghton Campbell 5*5 
Hydrogen-ion concentration as related to the Fusarium wilt of tomato seedlings. 
Everett Clifton Sherwood 537 
Studies 
on the relation of aeration and continuous renewal of nutrient solution to the 
R. V. Allison and J. WV Shive 554 
growth of soybeans in artificial culture 
Index to Volume X 
PUBLISHED 
IN COOPERATION WITH THE BOTANICAL SOCIETY OF AMERICA 
BY THE 
BROOKLYN BOTANIC GARDEN 
At Prince and 
Sts., Lancaster, Pa. 
LONDON AGENTS 
WHELDON AND WESLEY, Ltd. 
3 , & 4 Arthur Street, London, W. C 
Entered as second-class matter February 2t, 1914, at the post office at Lancaster. Pa., under the act of March 3, 1879- 
Vol. X 
DECEMBER, 1923 
No* 10 
